I dont think you will find ant Rosh Yeshiva who would say he runs his yeshiva based on that haskgafah.
Of course he wouldn’t say it, other than behind closed doors to other Roshei Yeshiva with plausible deniability. Just like the Charaidim would never actually say that if the Medinah was destroyed tomorrow and no life was lost, they would make a bracha.
People know better than to shout unpopular shittos from the rooftops which will cause backlash.
The quote from Vaykira Rabbah of course does not mean anything the likes of what you took it to mean.
Not me, Rav Dessler. Argue with him.
College, just like any other pursuit that requires substantial investment of time and effort, would certainly be a problem.
Meheichei Teisi, Chaim Berlin & Torah V’Daas always had college students with full Sedorim. Other Yeshivos still do today.