Agreed. I was consciously trying to make a different point though.
If you're saying that the authors left all those characters capped at 30, because they didn't need to make them any higher, then I really disagree with their philosophy. I don't agree that villains should be built that way.
True, but it's still possible to build many of those characters with higher DEX, just take away some skill levels. Spider-Man, for example, while skilled, clearly operates more on instinct and natural agility, than fighting skill.
Also, piggybacking on what I said earlier, it does seem that some of the 'standards' might have been poorly thought out. Why do so many characteristics have to be set at 30, when clearly each characteristic has a different level of effect on the game depending on how high they are. Obviously, they don't all even out. STR and DEX, for example. It's quite common to have a 50 STR, but not 50 DEX. It's almost like '30' was thrown out there to make them all conform and fit nicely at the same number. I'm quite comfortable with 30 STR being 'peak human', but I definitely think DEX and BODY could be changed. Perhaps peak human for DEX could be 25 and BODY could be 20. As I said, looking over so many official 5E characters, the general design philosophy doesn't seem to fit it own standards.