You were not completely wrong mate!I could be wrong but I think Sirro and Mal were probably exceptions. I thought Super League was the start of the era where everyone could give up their side hustle.
I added to my post for context:

Junior Pearce was a metal work teacher at my HS - Siro and Mal were cops - etc
But the elite kids who came through from 87-88 never had REAL secondary jobs.