I have never seen a comment that I couldn’t read because it was greyed out. I always saw it more or less as sign that I should either take the greyed out comment with a grain of salt (which makes it less likely for me to post a snarky reply underneath) or it shows me that the thing said there (or how it was said) is at least viewed as controversial.

Marking opinions is not censorship. Even if you’d mark posts with a bold red “lie” watermark, it wouldn’t be censorship.

The thing to keep in mind is: when the communicative tool of greying out is taken away, more people will write pointless responses.