I don't really understand your point, I suspect for most people who have spun in the pattern and died, it was their first time..... and last.
That was my primary instructor, and yes he would regularly spin train students, I'm pretty sure you have to understand spins to teach them. In fact he had a student put a plane into an incipient spin base to final, which he saved. He had seen at least one massive screw up and what precipitated it. So I absolutely trust what he says over some guy on the internet berating pilots who don't do steep turns in the pattern.
I'm not an ace pilot, I don't need thrills in the pattern, in fact I work to keep my patterns mundane. If I get to the point where I need a 60 degree turn to correct things, I just power up, go around and try again. You do you, I'll do me. There are no medals for banging around a pattern.