True but slippery slopes are simply a thing. Like the Overton window. Every move takes a step further and moves something else from ridiculous into feasible.
And personally, I know this won't affect me. I don't own such content. I don't use the cloud without encryption first (thanks Cryptomator). However I just hate the feeling of my own phone constantly looking over my shoulder on someone else's behalf. Is that so weird?
I think we're saying the same thing. 100% agree here. I think (hope) the vast majority of folks wouldn't be affected by the proposal. But the backlash against it has been justified for exactly the reasons you outline.