Religions grow unlike a corporation which is built.
Most human beings have spiritual needs and beliefs. Religions start as an idea or shared belief and grow from there. Sure, some are silly due to archaic rules such dietary restrictions or how to treat one's slaves, but even if all the dogma was removed, most people will still need a spiritual outlet.
No offense.
But all major religions are based on utter nonsense.
There is no scientific evidence to back up ANY of them.
They are ALL based solely on 'leaps of faith'.
In other words - nothing.
No one needs to believe in nonsense.
They just want to.
Weak people want to believe that there is something 'bigger' out there.
That there is some 'hero' or 'mommy/daddy-figure' looking out for them.
Because they have not got the guts/strength to face the truth...that they are alone.
At least, so far as we know.
So, like the wimps and/or idiots they are, they make leaps of faith and deliberately choose to believe in utter nonsense so they feel 'safe and protected'.
ALL, major religions are for the weak and/or the ignorant and/or the desperate.
NO exceptions.