Intelligent things do not require an intelligent designer. Given what we know right now about evolution and the universe, taking into consideration the vastness of our universe and number of possible habitable planets (including that we may not know other kinds of intelligent life form habitats), it is EXTREMELY LIKELY that molecules in once in a billionth case form very primitive life forms spontaniously without any supernatural help.
Of course we can't know this for sure, but given what we know and can/could prove in the future, this is our best assumption so far.
That's why proving that abiogenesis work in a lab is such a big case. Because if it could happen in a lab spontaneously (given the same ingredients that occur naturally and making the same environment) even in 1 experiment out of thousends, it is very likely that it could happen in nature given millions of years, and therefore billions of trial-and-error by laws of physics.
This yet best guess and future fact (I hope) would be proof that we do not NEED a designer, which disbands the logical reasoning that everything what seems to be designed needs a designer, therfore pointing flaws in logical reasoning like yours (in first posts) what leads to exactly the same question:
How God is likely to be real, given what we know?
But!
You can't use those arguments because they have flaws in them. If you still use them you woudn't be considered a worthy logical thinker, because you are using arguments that somebody else had prooven you false to be. You have to admit your flaws first, and then consider future discussion without them.
You can't use Bible either because it's man-made and provides circular reasoning: There is God because Bible said so, Bible is True because it is influenced by God.
You cannot use arguments that it's the largest religion. Making something the largest doesn't make it true. Some day ago all people were flat-earth believers, now they're close to zero. Some day ago all people belived that sun revolves around the earth, now we know it's the opposite. Those examples occur all the time, I can give you many more if you want. The point to critical thinking is not clinging to what you belive is true no matter what, but to update your knowledge given enough evidence. There is no shame to admit you might have been wrong all your life (I do it on daily basis actually )
You cannot give the arguments about miracles because all of them can be disbanded/explained and it is proven that most of them are false pattern recognitions and the rest of them are fakes. I could provide references but you insisted that I am giving links, so I won't.
The "religion is useful" argument is out of bounds. Useful thinking doesn't make the thinking true. Buddhism is useful—it doesn't make it true. Jewish thinking is useful but it doesn't make it true either. AND If you break down religion to a) belief in god, b) community, helping people and morality, it can make as well a) not useful and b) useful. Still, none of this provides any evidence of god's existence.
Given the above 5 statements and keeping them in mind let's consider some couter-religion reasoning.
Q: How easy it is for priests, bishops, popes etc. to control masses through the prism of religion? (eternal heaven & hell idea)
A: Piece of cake.
Q: If an organization fund school and have it in their possesion, how easy it is to manipulate information taught to students?
A: Piece of cake.
What leads me to:
Q: How likely it is to be that religion is nothing more than a mechanism trying to control our thoughts?
A: Very likely.
And:
Q: Would the world be worse without religion?
A: That's a tricky question. I would say christianity WAS in some way useful as it provided people a way of life given what they knew at that time. But on the other hand there were crusades, witch burnings, and killing free-thinkers who opposed "the institution". How do I view it? We still would be better off. In ancient times people already formed scientific communities. I would call them free-thinkers for the sake of my argument. There was a chance that they would grow and expand just as Christianity did but wasn't given enough resources and one more thing. They were not fighters. They were pacifists. Christians burned their work and buried them alive, just for the sake of "we know better what happened" or to keep power. Luckily, they can't do it right now
This is also why Christianity "lived" for so long and grew so much. If somebody opposed them they simply killed or imprisoned them. (Last religious war 17th century, killings in the name of faith up to this point)
This continues up to this point with creationists trying to bend their look on evolution as much as they can and Vatican already making theories without claims on extraterrestial life.
The problem here lies that we no longer need religion, we are grown up society, and we should stop beliving in santa claus already. We can do better. We can do science which works like magic, but instead of using our resources to learn more, we use them to decieve ourselves further.
That's why we have to fight, for the sake of our children's future.