State universities are rather highly subsidized by the state taxpayer and do not have infinite seats, especially if they want to keep up their academic standards and provide a good educational experience (for example many admit-everyone community colleges have abysmal completion rates and provide limited utility to their students).
The trades are obviously a good place for people to go that are not academically oriented and want to make a good living. You get paid even as an apprentice, so should not be in wild debt. Countries like Germany have highly skilled craftsman, technicians, etc that make high value goods for sale in the world economy, and a robust middle class.
I think calling state schools diploma mills is remarkably unfair. If your snowflake is so special as to be too special for your state flagship or even #2 school, go knock yourself out and pay full-fare at a private school. But this is a small fraction of the educational market … maybe the top 200 schools are better than an average state school.
Community colleges seems to have a broad range of quality, I think partially because it is not a homogeneous group. A feeder school for Berkeley is just nothing like an urban CC that is trying to remedy 12 years of poor public schools as well as major socioeconomic issues.
Maybe the issue is that the government should not guarantee bad debt. You can broaden the criteria, certainly beyond the almost impossible mortgage qualification, and offer some money to students with potential, some money to parents who are willing to forgo some luxuries to give their kids a boost, and then more money to parents who can pay back the loans (but at that point, why would these parents not take conventional loans with normal bankruptcy rules).
And all this talk about massive debt is likely making some people kind of buy the McMansion of education. If there is massive loan forgiveness, why not send snowflake to that private school with the lazy river and glossy brochure or send that really marginally capable kid to community college with no prospects. Sort of the “squeeze money out of a rock” idea, the taxpayer will never get some, many, most of these people to repay their loans … so what is the endgame ?
If the taxpayer is subsidizing education, rather than an enormous loan industry, it would seem like you could focus money on schools that are actually serving their students and you could draw … gasp … a line as to how low you will go with standards. Or say have a pre-college prep school like a community college, but one that really brings underpriviledged kids to a normal college standard through extensive tutoring or whatever.