

Regarding your tangent - I think that individual brains work in relatively fixed ways that are established early on - likely at least in part genetically, then refined mostly in infancy and early childhood. There’s a fairly wide range of things a brain can do, but even beyond likely genetic inclinations, there’s not enough available energy or time for individuals to develop all of them, or even generally most of them. And once established, I think they’re fairly fixed - the individual brain already has a number of set paths that it follows and specific regions that are most well-developed, and the body focuses on maintaining those rather than building new ones.
And a lot of the things that we recognize as distinct fields are actually comprised of multiple abilities.
So yeah - you end up with seeming oddities like mathematicians also generally having some artistic/creative ability and business majors generally not having any. The underlying abilities that make mathematics a rewarding field necessarily include abstract thinking, while those underlying business do not - business thinking is necessarily very concrete.
And it’s s perennial problem when people who are especially skilled in one particular type of thinking believe that that means they’re skilled in “thinking” in a broad sense, so able to meaningfully comment on things that are actually entirely outside of their skill set - like tech bros pontificating about art (or my personal biggest pet peeve - research scientists pontificating about philosophy).
Occam’s Razor says that if nothing notable has changed even under Trump, then it’s likely that the simple fact of the matter is that the allegations were mostly true and it’s just that the CIA, as opposed to Trump and his minions and lackeys, won’t lie on his behalf.