Exactly what I'm saying. It has nothing to do with his mental disorders, it's purely social influence from the cybercriminal ring and egotism.
He desires to be seen as a legend and the members of Lapsus$ are no doubt going to be praising the hell out of him for pulling off something so audacious.

OP is making it out to be like he has psychopathy or ASPD or some shit, which is not a diagnosis that's publicly known at this time even if that were the case. I'd rather not make massive generalizations of someone based on something that has 0 backing too.
The only disorder we know he's diagnosed with is acute autism and nothing else, which just as you said :

It could be something as simple as needing to feel powerful in their space. That's something a lot of people, autistic or not, can fall prey to

Which is exactly the point I'm making.