you're right... the way one is brought up means a lot...
not only that, once someone is on one side, switching to the other side is really hard for them coz human brain doesn't accept a new face of truth that easily... and other than that, the person probably already knows all the cons of the other side, but none of the pros
in other words, when a person is even researching a new religion or anything, they are likely to pay more attention to cons and that is why we have so few converts in this world
however, as a human, as a brother, as a whatever-you-might-consider-me... I'd like to tell you just one thing. Make sure you choose your side very carefully. Coz if even one of the religions was the right side to be on, your soul will be eternally doomed. And trust me, one of the 3 main religions namely Judaism, Christianity and Islam HAS to be right, because the 3 of them independently talk of the same thing. So its like 3 independent scientists in different parts of the world concluding the same thing! all 3 religions know the stories of Prophet Musa, Prophet Ibrahim, PROPHET ADAM, Prophet Noah, etc etc etc
It can not be a mere coincidence that all 3 religions were taught the same thing, all 3 religions are most widely followed, and the MAIN IDEA of all 3 religions is the same: There is only ONE God, creature of everything, who has put us on this planet for a mere test to decide the final resting place for our souls.
Peace