I wish i had the time tonight to respond to everyone, but I’ll just answer the last point AAQ made – rav moshe writes clearly “aside from the spiritual dangers” meaning he’s making it clear that the issue isn’t just ruchnius damage (although nowadays he’s definitely agree that a secular college is a death sentence for one’s spiritual well being)…the issue is gezeilas kishronosav, stealing the best years of a young man’s life when he’s able to grow in Torah and throwing it away in order to have a good job.
Rav moshe also intended this particular point for bnei yeshiva and not for the entire klal, to be fair. But to flip what you’re saying….in our time the issue isn’t limited to the stifling of bnei aliyah, it’s the toxic Atmosphere of any secular college which inundates students with poison…ask yourselves, granted theres a desire not to be secluded, but at what point would you seclude yourselves? What if there were unclothed people everywhere around you in a college? What if they forced you to bow to an idol upon entering?
The things they teach and the people you’ll be around are literally just as bad
Copying and pasting poorly translated mishnayos from sefaria is not going to win an argument; nor is quoting one controversial rabbinic figure