I don't really get this opinion; can't you say that about any job for Peter? What's so interesting about him being a teacher or photographer? Is working underneath annoying Karen (no idea what her real name was lol), the office administrator at Midtown High School, really interesting in the long term?
At least being a scientist has two main advantages in that it's basically what Peter's always wanted to do and what he's best at, as well as giving writers lots of ways to intertwine storylines between his civilian life and superhero life (ex. maybe some of his tech gets stolen by villains, or a colleague goes full mad scientist, or he needs to make some upgrades, or whatever).