What "ego massage"? Zuckerberg would mop the floor with Musk and they both know that. One is a 39 and has actually won martial arts tournaments, the other one is 52 and looks like he would pant after walking to the ring.
Normally I'd agree but the prospect of two dudes I find morally repugnant trying to punch each other in the face has a certain appeal, since no matter how it goes at least one person I think deserves to get punched in the face is gonna get punched in the face.