To be fair, money is absolutely one of the motives of those behind Spider-Man: Homecoming.
While it’s true that there have been a lot of different Spider-Man movies over the last decade, they’ve also all been movies that brought in hundreds of millions of dollars, showing that people are always interested in seeing Spider-Man on the big screen.
If the demand wasn’t there people wouldn’t be interested in risking the money.
Movie making is a business after all and while the art is important, if the art doesn’t make money, then there isn’t any money to make more art.