I get what you're saying, but I think that in the abstract "here's this thing you can do to cut the annoying traffic down to 1/3rd its previous level" (with the obvious issues to legitimate users of course) feels like a nice thing to have in this current moment!

If you were dealing with a DoS like this and had an option that cut the annoying traffic in half in a fairly deterministic way, that sounds like a decent thing to do operationally in the moment right?