Musk is not a engineer and has never been good at making things. What he is good at is marketing and raising ridiculous gobs of money which he plows into various companies. All credit for engineering successes at those companies is entirely because of the leadership of those companies, like Gwynne Shotwell, and despite Musk's interference which we have seen time and time again to be actively detrimental to engineering success.
That is not to say that Musk's interference is "bad" from a company valuation standpoint as he clearly has a pretty good idea of what features he can effectively market to customers, it is just that those features are not markers of good engineering or actively detract from good engineering. For instance, selling FSD to the general public despite it not working is a criminal engineering decision, but it has done wonders for cash flow and their stock price.
That is not to say that Musk's interference is "bad" from a company valuation standpoint as he clearly has a pretty good idea of what features he can effectively market to customers, it is just that those features are not markers of good engineering or actively detract from good engineering. For instance, selling FSD to the general public despite it not working is a criminal engineering decision, but it has done wonders for cash flow and their stock price.