Elon Musk starred a fad. The other tech leaders had to get in on the fad or seem out-of-date. The thing about fads is you don't do them because they're useful or because you thought it out; you do it because everyone else is and you don't want to look stupid for being left behind.
Owners of tech companies aren't immune to the same foibles that drive all of us; they just have more money.