Riley, every religion cannot be right. Which is more likely-- 1) they are all
wrong, or 2) only one
is right and it just so happens to be yours?
It is possible that there is one true, correct, perfect religion that has everything figured out. (For ease of argument, let's say that Christianity is this perfectly true religion.) This religion's prayers would work as advertised, without the need for excuses, complicated explanations or weasling. If a baby's hand got slammed in a door, the parents would pray to the right god and the baby's hand would be fixed right then and there.
No need for "well, you did not pray the right way" or "god wanted the baby's hand to be mangled to teach you something" or "see, god did heal the baby really because he gave us medicine and doctors who can sew the child's hand back together, if you have enough money to pay for health insurance and live near a hospital and have transportation there and back....."
The members of this true religion would have far better lives than everyone else. The miracles sponsored by this religion would be happening right and left. It would be obvious to everyone that this one religion was the only true one. Everyone would flock to this religion in droves. There would be no atheists or indeed, other religions. Why would there need to be any other if there was one that really worked?
You would never have to proselytize or witness or go on missions to other cultures to convince them to adopt your religion. You would not have to argue for your religion on internet forums. People would automatically convert as soon as they knew about it. People would be begging for it, even if they grew up in a culture where it hadn't dominated. It would eventually dominate everywhere. If this perfectly true religion existed, everyone on the planet would believe in it and the world would be a very much improved place.
Unfortunately, there is no religion that works like that--or if there is, nobody has uncovered it yet. Luckily, we do have something that comes pretty close, or as close as imperfect humans are going to get: science. That is why religious fundamentalists are so threatened by science. It works where every religion has miserably failed.
Science works for everyone no matter what culture. Anyone can learn how to use it and benefit from it. The miracles it has produced are obvious everywhere. People who have access to it have far better lives. And the vast majority of the world's population accept it without having to "believe in" anything. You don't have to force people to accept cell phones or computers or cars or vaccines or electricity or clean water. People can clearly see the benefits that science can provide. They become normal aspects of everyday life.