Again I wrote the piece but…
Folks "who are well actually, you can already make URLs meaningless"'ing are missing the point of how practical web privacy tools work, including the ones you all have installed right now.
There is an enormous, important difference between:
i) circumventions that are possible but are fragile and cost more, and ii) circumventions that are effortless for the attacker / tracker
Every practical privacy / blocking tool leverages that difference now, the proposal collapses it.