He did but it has barely been in the book, it feels like someone told him to do that because it has barely been featured or a component to the stories at all.
"Spider-Man also works in a college setting"
Ok, so you admit that Ultimate Spider-Man didn't need to be in high school if he works in college. As I said, that book sold well because it was the perfect storm of talent. Other attempts to tell the high school era have been attempted and not sold very well. Taking Ulitmate Spider-Man as an example that high school Spider-Man is inherently better is a false reading of why that book was popular. It was popular because after nearly 40 years, Spider-Man was being relaunched from the beginning of his continuity for the first time in a new modern day setting and that was a big advertisement and then the book was very well done to deliver on that promise. Do you really think it would be pulling those same numbers today if Peter was still in high school in that book over 20 years later?!
Spider-Man also works as a married adult. It lasted for 20 years and removing it was not done to help sales, nor did it increase sales. Some of the highest selling periods of the book happened under the marriage for various reasons (collector speculation being a major factor). Which shows comic book collecting popularity is based on much more than just what age Spider-man or if he is in school or not. I don't know why you can't recognize that.