KBJ misunderstood the facts of the case, that the other eight understood.
This was emphatically NOT about incidental restrictions on free speech. Had it been then the opinion would have likely gone the other way.
This was about direct censorship of disfavored speech, not incidental restriction.
This is an instance where being the outlier is a pretty good indicator that maybe the person misunderstands what they're looking at.
It's just nuts to say this opens such a can of worms. She might as well have been talking about the implications of our living on a flat earth.