Oh you mean, Fil from Wings of Pegasus.
I watched quite a few of his videos in the past doing voice analysis to reveal the difference between live vocals and pitch-corrected vocals.
I think I first began to be a bit in disagreement with him when he did a couple of videos about Voctave, specifically their "Disney Princess Medley", complaining about them having lots of vocal production on the MV, and because the video had them standing around mics as if they were singing, he was saying they were giving a false impression that they were recorded for the MV singing the final take. He was previously showing
My issue with him was that it was a music video, just set in that space. Their vocals were previously recorded and they were only acting to the vocal for the video. He insisted on taking a true live performance they did on a stage and comparing the two, which was annoying to me, since they're two different things.
My comment on that video was that the same thing happens with electric guitars in rock music where all sorts of effects and amps are used to alter and modify the playing of the guitarist to create different effects and shape the music differently. If I were to use the same argument he was using for Voctave (who do sing very beautifully live), then only acoustic/classical guitars are true guitarists since they only rely on acoustic properties to project their music (and no production, just amplifications) just like live vocalists using mics.
