By your actions shall ye be known.
Yep, obvious BS is BS. With some possible wriggle room. So plenty of videos get demonetised because they aren't advertiser.. I mean family friendly, or flagged as unsuitable for minors. So seems plenty to incentivise content creators to shoot for that demographic. Just not with firearms, because that kind of content is often demonetised..
And of course Google knows damn well that the age range it isn't for just happens to be a very valuable demographic for advertisers and nagware.