writersoul,
I wrote that not Sam2 (unless he wrote it too).
It is a common, when one is trying to convince someone else to take a particular course of conduct, to speak in exaggerated or absolute terms even though it is not literally true as such. Maybe you don’t do this (although watch what you say for a week and see) but the vast, vast majority of the population does. Chazal did it too.
Rabbi Altusky wasn’t lying. He truly believed that for this young man, at his stage in life, college would be bad. Rabbi Altusky presumably believed that he was guiding this young man rightly.
Rabbis, Chazal and people in general speak in absolutes all the time without meaning it literally. The problem is that a small subset of the population is overly literal and misses it.