Disclaimer: I'm not a psychologist. But thought these would be useful.
Isn't that an official thing? Genius, besides Leonardo Da Vinci, are not good at everything, that's super rare. They would be the genius of the geniuses.
For example, you can pick a super mathematician who can't diet for shit, even when people are telling him IF YOU EAT MORE, you DIE. And yet, they can't control their urges or understand that they won't be doing math or finishing their goals if they are dead.
The same goes for some athletes. They can remember moves from their opponents in fraction of seconds and moves to the place they KNOW their adversary will try to play at, for example, Nadal or Federer in Tennis. They are genius. Messi is another beast in soccer. There is a compilation of his known goal moves, that he has in his head, and he sees the field as a chess board, and he knows exactly when it's possible to do a goal. Hence, you can notice he has a set of recorded play he repeats and it gets even more perfect than the last time.
So yeah, you can't excell in all fields. Multiple intelligence is real.
One of the noteworthy points though is that there's nothing to verify if these specific archetypes for it are the way to go.
I'd say it's a good jumping point for discussions, as again it covers a lot of ground, but it's validity is questionable not for the existence of multiple intelligences, but as to why this chart in particular ought to represent the concept.
I think being ambidextrous helps. It seems I dont really have a more dominant half of my brain. It's rather interchangeable
How do you know you're good at so many "intelligences"?