I guess so, but I don't really see the point. Aren't there enough characters that meet stringent requirements that you don't have to bother with the ones that don't? Maybe I'm out of touch because I don't get highly attached to fictional characters/universes.
I care more about the body type and the behavior than the age when it comes to drawn pictures. Again, 900 year old lolidemon = you're still a pedophile. I wouldn't be able to tell that jotaro was 17 until i looked up the wiki info. I thought he was like fuckin 45 years old lmao.
I can literally just age him up 1 year in my head and he's ok to you. He is rendered younger at 28, 30, and 40 years old but behaves the same way as during 17. Why? because he's already character-typed as a grown adult despite the age initially given to him.
This is him at 40. Looks a lot younger than he was at 17. So it doesn't fucking matter.

If you find this attractive, though, you're a pedophile
Now, the real life argument:
Yes, they look like adults, but they sure as hell don't act like one. They lack the maturity and will act childish for they are real people this age. Who wants to date something like that???
2D characters have two-dimensional personalities. They aren't a whole person. They're depicted in one way with a complete disregard to what their assigned age usually entails. You could change Jotaro's age to 50 in the show and it wouldn't change a thing. I don't think any non-nigger 17 year old would act as jotaro does.
I'm willing to have my mind changed on this, I just need logic-based arguments rather than emotional ones.

this shit is why i don't trust ages in anime