what I learned is, I was brainwashed by my parents to pray as a child and when I prayed nothing happened. Eventually as I got older I un-brainwashed myself and realized if you tell a child to pray all their life they grow up doing that action out of a habit without understanding the action or religion. Billions of people are brainwashed in my opinion and I haven't really seen any evidence that praying does anything. As well from my experience a lot of religious people are quite brainwashed and closed minded.

Try talking to them about flat earth and they will get upset and defensive because it clearly states that the earth is flat and non moving and that the creator built this non moving world just for us so there is no need for another universe, planets or aliens.

How is it possible that billions of religious people got brainwashed into believing the heliocentric model? If so that means billions of people also got brainwashed into believing that praying or that a feeling in their body means it's a god talking to them.

I am not convinced.