Here, I disagree. Being the product and the patron of the “Yeshiva system” what I have heard is a critisism of the “outside world” (which is of course true) and nothing but praise for the life of learning (which is also true).
Where I think the “system” fails, is by letting the kids come to the conclusion, that its either / or. Pass or fail. Kosher or traif.
We, as adults, know that there is a time and place for everything. And under the right conditions, even things that are “off limits” under some circumstances, can become not just ok, but even something mandated.
So, its not that the kids are hearing no, never.
They are hearing, not now, not yet.
And that’s where we (as parents) step in and say, now is the time to be a grown up and do the things that grownups do.
And its not k’neged halacha or a goyish hashkafa. Its the way Yiddish homes are run.
I agree with almost all your points (I disagree why Yeshivos exist in the first place, and what their purpose is). Parents have to be involved.
However, too many parents are not strong enough (or agree) with the schools to create changes.