As far as I know, no court has every disagreed with that reading, which is simply the plain meaning of each of the words in the statute.
From the day the text was proposed, the fact that the only thing thar a DMCA takedown required to be sworn under penalty of perjury was that the complaining party represented a rights holder has been a frequent point of criticism.
> The best I can find for someone trying to raise that interpretation in court is when warner bros tried to argue it here
No, WB was not arguing that point, they were arguing that a hosts DMCA takedown notice form which purported to require additional certifications to be made under penalty of perjury was invalid because private parties can't just add “under penalty of perjury” without the legal requirements of perjury being satisfied and expect it to have legal effect. The host in that case agreed that what it tried to make under penalty of perjury was beyond what was required in the statute, but argued that the form did, in fact, have effect. IOW, the base requirements of the law weren't in dispute, the effect of a private form as to what was under penalty of perjury was I dispute.