“all those girls were snapped up by any guy with a brain before college was over.”
Yep! Those women do exist, rare, but they exist.
There are a lot more of them than most people know.
They are either in private schools or being home schooled then are sent to upscale private colleges. So unless you went to private school or attended an upscale private school you might assume they are nearly extinct.
A college like Baylor or SMU has 1,000’s of them.