I think people come to different religions because they use different methods.
People may simply accept the religion instilled upon them by society. In most countries, this is either some form of Abrahamism of Hinduism.
Others may accept the "science" being fed to them by the opposite side of society, and simply believe in the alleged "big bang", which could not happen because there without existence, something physical could not create existence.
These people think they are digging deeper into our existence, but in reality, they are simply settling for the shallowest and thus most easy to believe explanation.
Others rebel and follow the Left Hand Path. Most Satanists have a much stronger Luciferian spirit, and seem to escape any indoctrination relatively unscathed. These people seem to naturally gravitate to the the "scientific" explanation first, as it is the most easily accessible way to separate themselves from religion. They often find LaVeyan Satanism. Some realize that there is a deeper explanation, and move on into Theistic Satanism. This was the case for me.
In short, I believe that there are many "religiontific methods" that all lead somewhere different. I think which method one uses has to do with the strength of their Luciferian spirit, and how much they think about things.