When I was growing up, we needed the money and I worked or tried to, with mixed success, all through HS. My first three college years were actually part-time with a full time job. Then I got a scholarship and, eventually, a TA-ship, to finish.
It never occurred to my kids to work during HS. In college, my older son worked for part of his first summer, then took off with two friends for a month in Europe. I don’t think he worked the other two summers, but he always had a job in the computer center help desk. My younger son worked for two of the three summers for a company in his specialty (traffic engineering) and spent the third as a kind of intern. My daughter worked only in her third summer. But all three had regular jobs at their colleges during the school year. And all three score very high in conscientiousness.
But in my Chicago suburb, there is absolutely no impediment to a teen finding employment.