You also talked about, in that comment, the age all other things are defined as adulthood, but that’s not even clear. Contract law says 18, unless you qualify for unreasonable to live at home, where you can sign contracts at 16. The driving age is 17 in several states. Medical privacy takes effect at 15. Age of consent nationwide is 16 (as long as the other person doesn’t have a duty of care over you). So there’s already a lot of precedent for a younger age of adulthood.

When I was 16, I was politically involved and I wanted to be able to vote. You could say that anything you’re not motivated to care about is a distraction. Plenty of things are tried again in politics as the world progresses. That’s like saying we should give up on climate change.