You may be right. My guess is, Musk got too full of his car company's successes, stock price (dwarfs all other car mfg'ers) and basically himself. His other exploits seem to support his self over-assurance. Just my 2 cents.In a nutshell, I don't think cost or profit was a formula in the design team. I have been on enough design teams and if those were the constraints there is no way they end up with this. For whatever reasons - at the time they did it they simply didn't care. But it certainly was not due to a simple mistake.
My 2 cents also thinks Tesla will continue to dominate. Data is AI's foundation (and everything else's) and perhaps the most valuable revenue source.