The human race can't last without limits after all

Why do we care so much when it's our lives as well as the entire human race that eventually doesn't last all of the time, everything that we put importance on as though it were to last without end, but nothing lasts without end after all. Also after all, so many kids might very likely be taught that specific things are wrong, or that video games (for example) can induce violence.; but why care if they only have one life, and why even care about our future generations, if they themselves won't last indefinitely. For goodness sake, the human species in its entirety probably won't last without end. And as for climate change, the human race, after all, can't live without placing limits in place; that's how it works. There's no question about it.