You lost me at "Musk is the only one who really seems to be "walking the walk"", which is inconsistent with the rest of your theory, but luckily for you that was the last sentence. :)
It's clear Musk is also interested in consolidation and expansion of his empire, probably one day under X.com brand, but I guess since he is good at working on his fan base and talking about imaginary ideas, he should be treated differently than Larry Page or Jeff Bezos.
When you think about it from another perspective (playing devil's advocate here for the sake of illustration), SpaceX is not about going to Mars, it's just another satellite launching business working its underpaid employees 80-hour-weeks with that line; SolarCity was just another put solar panel on your roof business you see a ton of in Costco without any clear differentiation (how about "unmerging" that too, by the way?) Heck, look at Tesla "Autopilot", nothing but a joke.
If what Musk does is Good, I like to point out Larry Page's company had a self-driving car project since ages ago; they tried doing breakthrough work on life sciences, and a lot of other things. Perhaps Larry Page should have dated Hollywood actresses all-year-long to get more positive press coverage.
The point is, yes, there are pros and cons. And you basically agreed to the parent post's when you brought up Musk's example.