The gear is less of a problem, as it's only a tool. The problem is that songs are written based on the last number one hit. People don't generally say "I want to write a song like nobody has ever heard before" they just want to write a song that's a safe "hit" with absolutely no originality, that's going to make money. There are very few trend setters, in comparison to the number of trend followers. That's why everything sounds the same, more so than using the same gear as somebody else.