Imagine a toy model where everyone has a hundred points to put into being good at things.
(This is, to be clear, not just a toy model but an incorrect model. It’s easy to look at your incoming university students and notice a strong inverse correlation between math and verbal SAT scores, forgetting that those get summed together during applications and anyone below a certain threshold probably has their application discarded. Still, let’s use this model for the moment.)
Leading talents in a field maybe put 75 points in their area. Why not 100? Because you need points in living your life
Obligatory von Neumann reference when talking about allocation of mental resources.
I’m not sure if this hurts or furthers your case, since he was a known extreme polymath in the sense you describe (being the best A/B in the world was probably A/B/C/D.. for him), but for many individual areas of thought was arguably at some point either the “best” or at least maximal for most common ways to measure brilliance.
That is, he was the best A regardless of B and, at a potentially different point in time, the best B regardless of A.
Also, he was famously very well-adjusted for someone of his accomplishments.
A good place to sprinkle hyphens around and see what sticks