Once you get some more life experience, < go 2 collage + secs w/ lots'o'grils >, then graduate to full adult, you'd realize living as a modern human is no different than being a rat in a cage. @ about ~Age 25, you'll have seen it all. Once you've seen it all, the existential qualm is resolved, a rock is a rock.
Yea, some of your neighbor rats may have access to more food/drugs/secs late game, but items/experiences such as those don't stack, and they're no different than what you've already come across (by that time)..
If you are very technically inclined, consider signing up for dream teams like Tesla/Aerospace/Weapons contractor stuff. You'd be there for the science and the dreams, not experience.
Experience is really just a sensor system, it's suppose to keep you alive and replicating, but for the majority of modern humans, this is a non-issue and irrelevant.
For example, even if you have no progeny, india will make 5+ for your -2, as will african countries. Humanity is quite secure, and Nature will reset humans if they screw up too-hard, and even that is OK. Nature operates on Geological Time, and sooner or later, there will simply be a new intelligent race rebooted.