I think it's because they're a huge player in the space and the PS5 appears to be the dominant player in the console space this generation. This affects so many people in their faces right now, where as the switch to "buying" movies on an online platform was more gradual as it was a new platform offering and not one that had had ownership from day one (arguably since 1994 with the PS1).

So in short, I think it's because they're the big guy making a very visible change to the broader public, instead of a new platform with a new way of doing things (how Steam was).