Think forward to when most everyone is using security keys, and 90% of users use one from one of the big brands. Then someone tells a bank's security chief "did you know users can defeat our security by installing a piece of software?"
They'll look for a solution to that, and the solution will be using the feature to restrict keys to trusted brands. The only downside will be annoying a small segment of customers. But at that point they won't care, because those customers don't conform to their security mold anyway.
For a contemporary situation playing out right now, many websites have decided to outright block or CAPTCHA-harass connections from datacenter IP addresses. In their mind, all such connections are fraud and abuse rather than legitimate paying customers that happen to have custom network setups.
And of course the use cases seem compelling in the corporate context, because corporations are authoritarian organizations where top-down control is simply accepted. The problem is that they push their authoritarian desire for control into technical standards, which then unleash that centralizing control onto the outside world.