Vulture, Rhino, Scorpion, Mysterio, Dr. Octopus, Chameleon's abilities also come from chemical masks. And Green Goblin is part tech-based, with a glider and pumpkin bombs and razorbats. So that's also tech. If you have six and if you add Goblin, 6 and a Half tech-based villains, then most Spider-Man villains are tech-based villains.
Huh. New York is a place where you meet all kinds of people is about actual diversity. Trying to equate that to Spider-Man's rogues is bizarre. New York is a city where you meet diverse people from all nationalities, peoples, cultures and sexuality types. Aside from 3 Russians, most of Spider-Man's villains are white straight dudes with Martin Li/Mr. Negative being a very belated example.New York is a place where you meet all kinds of people and Spider-Man's enemies reflect that.
Let me clarify. Batman's villains have people the same age as him, people older than him (Hugo Strange, Penguin, Ra's Al Ghul, Mr. Freeze), women, and you have a proper mix of different types and thematic range. You conveniently missed my point about none of Spider-Man's bad guys being the same age as him. Batman's villains have range and coherence. As crazy as they are they all fit with Gotham City.Also, you moved the goal posts since in the original post you sited the "variety" of Batman's villains as a strength which Spider-Man villains lacked. Now it's suddenly a problem for them?
In the case of Spider-Man, there's a lack of both range and coherence.