I'm not religious but when you sit and think about the bigger picture, existence, purpose for being here etc it all results to nothing, there is no point to life really, you can come and go and in a few years, you'll be forgotten. I guess religious people use it as a drive to move them through life believing in a purpose.
I say if you need that reasoning and it helps you achieve or deal with things in your life, what's the problem. Live and let live