

There’s no meaning to life, because that implies intent for it existing. It just does. However, I think it does give us an imperative to try to do good with the life we have. We’re one of the few things in the universe that can experience pain and joy, and we should be trying to minimize the former and maximize the latter for the other beings capable of them.
Nothing happens if you do or don’t, but it does make everything better for everyone if you do, which includes yourself for the purely self motivated out there. Life isn’t a zero-sum game, so we should try to make it as nice as possible.
I don’t understand how you’re both not spiritual and believe this. However, if you’re right then those people are assholes and so I want to align myself opposite to their goals.