Nah, you live in an unfeeling, uncaring world. There is nothing, no great answer. Just living until you die.

I don't agree with that other guy, but now you're just wrestling with a straw man. Nobody says these things.

Nature and physics may not have the capacity to care about you, but you have friends, family, and pets that do whether God exists or not. And there's plenty of questions that seem like we won't get an answer for the foreseeable future, but that doesn't mean you can't find any meaning or joy in trying, or that you can't tackle smaller questions that could build up to answering a greater one.

Just living until you die.

This part is particularly cartoonish. Nobody says life is just living until you die. That's a debatably bigoted caricature that Christians invented.

We live the same lives theists do, and we have just as many meaningful experiences and relationships. We just don't sacrifice enormous amounts of our time worshiping or thinking about something that can't be shown to exist unless you take someone's word for it.