On articles about the beginnings of Amazon, the writing culture, or anything that is in part a biography on Bezos, I always see it mentioned how smart he is.
I think the distinction between "evil" and "evil genius" is actually kind of important for a world that often anchors its reality to Hollywood narratives. It sets up a more believable antagonist, and makes it clear that -- unlike the grinch -- their heart is not likely to change.
It also sets up the challenge: be smarter. If he was just greedy, it might be a race to the bottom (greed always wins). But in this case it's a race to the top (intelligence seems to win).
I also think the distinction between "greed wins" and "smart wins" extends with a similar lack of mention into other popular "villains" like Elon or THE ZUCK.
At least for me, knowing that the richest person in the world is also considered extremely smart by the smartest people he could pay to work with him... it makes me feel that -- unlike politics -- business is not yet a complete race to the bottom.