In summary of the above, puppylander suggests that having experienced Americana high school as the final stage of formal education leaves one frozen in time, in comparison to those who have experienced "higher" education. Brouhaha ensues as he is accused of being an educational elitist. Puppylander uses the metaphor "immature" to describe the HS-only mindset, which term does contain an inherent value judgment.
Generalized American "high school" is awful; in its own way, perhaps more awful than generalized American college. Both institutions exist to transfer monetized labor from workers toward enforced state educations. In the case of high school, primarily state-run institutions transfer funds toward technology and publishing companies, where the enforcement is mandatory and the marketing so deeply embedded it's rarely questioned. Neoliberal lala-demo-exceptionalist history, useful for docile citizens of all castes, prances alongside state-subsidized remedial math- and science-prep for the next generation of weapons and consumer products designers. The "free" nature of the no-adult-legal-rights holding pens makes it, much like colonialism, a selling point for endless intervention. Those who emerge from it, and who swallow its necessary survival lessons, along with those it implicitly and insidiously teaches, are quite often molded into an unfortunate shape. As "immature," perhaps, as puppylander suggests.
By contrast, college's non-mandatory selling point is a refinement of the adult-legal-rights-possessing in-duh-vidual into an even more productive citizen, with even more resources to cite in support of demo-exceptionalism. The major difference with regards puppylander's point, however, is the socialization aspect. While being an adult in America is much like being a traditionally-raised or -schooled child, in the sense of constrained movement, violent enforcement of atrocious mores, and authority not possibly caring less about pain and misfortune, college teaches increasingly-sophisticated, out-in-the-open repression of horrors, leaving the underlying vulgarity of situation an unpleasant reminder best left in K-12.
That, in a way, is more terrifying than the honest brutality of childhood and inmate-run youth prisons. However, high school (and the rest of K-12) remains, literally, more "immature" than college, in the way that Michele Bachmann is less mature than Barack Obama. Yes, they are both terrible; yes, they are insane, and Obama is likely more dangerous.
This does not mean that Michele Bachmann, or the average product of American high school education, is not also insane and dangerous. Puppylander thereby retains an acceptable point, which could have been better refined to avoid offending the concept of not going to college--but then, that same refinement would be the very mature behavior he suggested college taught. The tragic irony is that he clearly should've paid more attention in PoliSci 412, or better yet, Advanced Trial Advocacy.
In the interest of balancing the scales, and while nonetheless retaining utter contempt for Americana's perfect ivory towers and their resultant Eichmanns, this one will find a value in puppylander's underlying point about post-K-12 socializing. The tempering of intrasocial violence preached to often-newly-christened "legal adults" at college stands in contrast to K-12 violence. Consider, as an extreme anecdotal example, Aaron McKinney. Neoliberal voters and their college are scarier in the long run than neoconservative voters and their high school, but calling a fire hot and dangerous is not, in and of itself, wholly wrong.