I don't know for America, but I can say in France, I never see by myself (since 1990) this staying away for high studies to be actual. I think this advice was never really followed by french JW. (All the JW I know, and was able to do it, made at least three years of University).
It's impossible to not make university here. Without high diploma, you can just live under a bridge. Or you have to be manual!