This is the entire arm community, and its so entrenched that despite SBBR/Systemready just about every single SoC manufacture and board vendor continue to follow this one off embedded mindset where everything is bound into a blob containing the firmware, OS and applications. (ex: see rpi) when just focusing on conforming the existing firmware standards would allow not only one off hacked up linux to work, but windows and various other OS's. There isn't any reason other the stubbornness and ignorance that the arm ecosystem doesn't work just like the desktop PC market at this point when it comes to being able to install any random OS on any random board.

There are some notable exceptions to this (Solidrun?) but the senior engineering has blinders on (and lots of false excuses why it wont work), and the mgmt chain likes the status quo because they see it as some kind of market segmentation strategy.