I would have thought the two obvious things are
1. Politics. Lot of misconceived and ridiculous postings on here in the last couple of months.
Lots of posturing for a particular view/party/candidate etc. But not one single idea ! And that's a sad indictment for a future electorate !
And the other....
2. How to live life as a responsible adult.
How to take care of yourself. Physically, mentally, spiritually etc.
It's a big topic covering many facets. And I can understand reluctance to address it.
Educators I suspect, hope that this subject is taught by parents. Family. Those close to home.
Yet it's clear. Just reading a page or two here. That it's not happening.