The DMCA is a weapon that mainly large, rich companies use to beat up mainly small, relatively powerless end-users. That's what needs to be corrected.
I'd also argue that a large portion of the US legal system is set up to facilitate this "big&rich beating up on small&poor" behavior, but that's a topic for a different day.
You are guessing wrong.
"I think it's Y with no evidence"
"Woah woah there, how dare you disagree with the groupthink, are you prepared to cite some sources?"
Why does X but not Y get to be presumed true until proven otherwise? Because we really want X to be true okayy.
"I guess X"
"You are guessing wrong"
Is using the DMCA to legitimately defend the copyrights of small-fries too much of an edge case?
The counterfactual to making an illicit copy of Thriller might conceivably be that you pay for an official copy. The counterfactual to making an illicit copy of Everybody Needs A Robot is not that you pay for an official copy. It's that you go do something else, which is worse for the artist.
If we're going to go to filing fees/deposits, how about make the remedy be a fast-track way for the violated person to seek damages, not just play takedown whack-a-mole?