Earlier quoted context omitted.
Personally as much as people like to dunk on Musk, he did build several successful companies in extremely challenging domains, and he probably listens to the world-leading domain experts in his employ. So while he might turn out to be wrong, I don't think his opininon is uninformed.
I fully agree with your first point: Musk has shown tremendous ability to manage companies to become unicorns. He's clearly skilled in this domain. However, if you think about this for 2 seconds with even a rudimentary understanding of sensor fusion, more hardware is always better (ofc with diminishing marginal value). But ~10y ago, when Tesla was in a financial pinch, Musk decided to scrap as much hardware as possib…
I would firmly disagree with that.
What Musk has done is bring money to develop technologies that were generally considered possible, but were being ignored by industry incumbents because they were long-term development projects that would not be profitable for years. When he brings money to good engineers and lets them do their thing, pretty good things happen. The Tesla Roadster, Model S, Falcon 9, Starlink, etc.
The problem with him is he's convinced that he is also a good engineer, and not only that but he's better than anyone that works for him, and that has definitively been proven wrong. The more he takes charge, the worse it gets. The Model X's stupid doors, all the factory insanity, the outdoor paint tent, etc. Model 3 and Model Y arguably succeeded in spite of his interference, but the Dumpstertruck was his baby and we can all see how that has basically only sold to people who want to associate themselves closely with his politics because it's objectively bad at everything else. The constant claims that Tesla cars will drive themselves, the absolute bullshit that is calling it "Full Self Driving", the hilarious claims of humanoid robots being useful, etc. How are those solar roofs coming? Have you heard of anyone installing a Powerwall recently? Heard anything about Roadster 2.0 since he went off claiming it would be able to fly? A bunch of Canadian truckers have built their own hybrid logging trucks from scratch in the time since Tesla started taking money for their semis and we still haven't seen the Tesla trucks haul more than a bunch of bags of chips.
The more Musk is personally involved with a project the worse it is. The man is useful for two things: Providing capital and blatantly lying to hype investors.
If he had stuck to the first one the world as a whole would be a better place, Tesla would probably be in a much better position right now.
SpaceX was for a long time considered to be further from his influence with Shotwell running the company well and Musk acting more as a spokesperson. Starship is sort of his Model X moment and the plans to merge in the AI business will IMO be the Cybertruck.