Well sure, but the idea that if failure is induced at 20 pulls that 100 has no strength value (other than cardio and endurance) as the end all be all of working out is what you are going to have to give up to be taken seriously. This idea that anything beyond a certain number of reps becomes detrimental is one of many philosophies on paper constantly being overturned in the real world. like with convincing BW folks, just because something is workable doesn't mean something else is unnecessary or detrimental. You need to prove it. I've done crossfit workouts that involve pullup after pullup after pullup interspersed with other exercises, doing so many that after awhile 2 or 3 was pure pain. . These workouts by far were more challenging and yielded better STRENGTH gains (not just cardio) then anything I've been able to rig up with lifts and low reps alone.
Anecdotally doing the standard powerlifting 3,3,3,3,3 or whatever variations indeed are always going to work better for serious strength which is why those are standard with people lifting way more than either of us. Perhaps at a certain point you will reach plateus with your own approach and be arguing something else entirely...you never know. I like doing the 1 set thing but really is not generally more challenging for me nor would ever argue it as any better than anything else I've done nor would I try to argue what is clearly working for other people. I will argue with lifts as superior vs BW, but If the pure BW people can show me they can do heavy overhead squats, deadlifts, bench and the like...then its another story.
Whether they are necessary or not, high rep workouts do have the ability to build STRENGTH (not just endurance or cardio) and in cases better than 1 set up to failure. If we are talking what to do as the core of a strength approach, Iower rep higher weight is likely going to win out as most efficient. But painting them ONLY as conditioning is not accurate as they can allow for better strength gains, particularly when part of an otherwise reasonable program. My point seems more agreeable, that many approaches are workable, and that you need to compare which ones are going to be right for which goals. That there isn't going to be a single package that works the best all the time, only factors that are more often more correct.