There's an increasingly blunt divide these days between people who think cruelty is a good signal because it's in some way "realistic", and people who think avoidable suffering is bad and should be avoided. This is almost exactly the "woke"/"antiwoke" split.
This might map with the idea how the military first needs to break a person to rebuild them in something that's capable of doing what society has taught us to never do (namely, kill others), and more strongly to what I've been increasingly hearing lately in the business world which is "antifragility".
In no way I am equating killing with building resilient systems, but I can see a thread connecting them when someone thinks that cruelty can produce better and improved new behaviors or systems.
But did he have to be so cruel? Post this picture https://twitter.com/elonmusk/status/1592618665933156352 while 5k people lost their jobs? And all the other stuff... I mean... it's one thing to "tell it like it is", which is a trait a lot of people admire. But he's just doing a bunch of stuff that deep down only abominable human beings would think and let alone act on it.