The OS is no longer a product they care about. Brings no money compared to Azure.
It may not be the bean counting optimal, but it is a long term image they project of the company.
I'm in the latter category. As a Sunday photographer who daily drives Linux for work, I can't justify investing in Apple hardware. I used to daily drive macs, so I'm not against Apple on principle, but for my current needs it's just too expensive, since for my actual work Linux works better for me and the hardware is free (through work). Since I don't spend 8 hours a day using Windows and my income doesn't depend on it, I just put up with the shoddy quality. I can do what I need with my photos and it's good enough.