If they were trying to save costs they would ship the community firmware on the device to begin with because then they wouldn't have to write and maintain their own. The community welcomes them to externalize those costs onto the people with better incentives to improve the software.

What they're actually trying to do is obsolete the devices faster because then they won't add new protocols or other software-only features to older devices so you have to buy a new one, or only expose features in more expensive models that the less expensive hardware would also be capable of doing. Which is all the more reason for us to not have that.

And if they were required to allow anyone to replace the firmware then you would get companies reflashing and selling them that way from the store because the free firmware has more advertisable features. There's a reason you can go to major PC OEMs and pick between Windows, Linux and "don't even install one" and the reason is that if you give customers a choice, they generally don't want their software to be made by the OEM.