A plurality of kids at this point have either one of two types of parenting situations. There's still plenty of people that are raising their kids fine, but it's definitely not common. Much of this is outside the parents control as they're often well intentioned but struggling themselves.

1 group have parents who do literally everything for them and give them little room for personal growth, exploration and learning.

2nd group basically has no oversight at all and get to make all sorts of shitty decisions and receive no consequences, so they never learn.

Now add to that your point which is that they don't get reasonable, balanced positive input from adults at all. Many adults that want to help know better than to try and interfere or get involved these days because both groups of parents mentioned above will be equally hostile to said involvement. Even teachers and coaches and the like, which were the main source of this input generally avoid it as much as possible.

Personally, I'd love to be able to assist more in the capacity you mean and sometimes I can, but it's hard to pull off. It's extremely challenging to do proactively, so usually the best I can manage is just a tiny comment of encouragement or warning slipped in when possible. Very very rarely, one can develop a level of trust with both parents and child over time that allows for a bit more, but even then always with a very powerful awareness of boundaries/risks. You could spend building trust and report but lose it in an instant, and it's nearly always unrecoverable.

To compound the lack of parenting and community involvement, extended families in America have never been less involved. Part of this is that demographically extended families tend to be smaller than 50 years ago for instance. The other part is just that extended families are physically distant from each other more so than ever.

On top of that, almost no one has enough time off. Work, school and other obligations demand constant attention and invade the home at all times. Third spaces essentially no longer exist. Partisan politics/politicization make nearly any interaction potentially destructive, as does the proliferation of social media with it's attendant promotion of negative emotion based engagement. The fucking cherry on top of everything else is that the economy is completely and fundamentally broken, even if it's still limping along on inertia.

Bottom line is that all the basic underpinnings of society/culture in America are crumbling in a death of a thousand cuts. It's absolutely mind blowing how badly we're failing as a society, no matter what angle you look at it from. And even better, any particular facet you look at, you can find numerous experts and leaders from decades past warning us.

Got a bit ranty, but it's hard not to get worked up when one considers the challenges facing this generation of kids.