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No, you're objectively wrong on this. It is more akin to cosmetic surgery because it is harmful for your teeth and potentially dangerous. This isn't a normal hygiene standard.
My dentist disagrees. He recommends moderation, but says it is not harmful, much less dangerous.
I do it myself, about once a year, and I don't have any issues at all.
My dentist said I could do it more often if I felt I needed to, 3-4 times a year, and my enamel would be fine, as long as I followed the directions.
I tried googling it and found no source that corroborated your statement. (I did find a Mayo Clinic and NYTimes article that both support my dentist's claim.)
I'm willing to listen if you can provide an article, but your "objectively wrong" comment seems a little, well, objectively wrong.
I have been told by my dentist that it can permanently damage your tooth enamel. I did a quick search and found an NIH study on enamel softening. It looks at hardness, but that is all. I only read the object and the abstract, but that part didn't mention enamel thickness. The study mentions that hardness is restored after about a week.
I would generally advise caution and just take your dentists advice about these things. I will admit I am generally biased about this and it definitely can be harmful if not done correctly.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4319295/
They never called it hygiene.
It is indeed potentially harmful, but qualified, legitimate dentists will have the answers needed if it's ok for any given person.
I think comparing whitening to bathing and using deodorant is calling it normal hygiene. Not bathing literally leads to worse health outcomes.
That being said, you're correct, I definitely have a strong bias towards this. I have been told by my dentist to not do it because it is damaging to the enamel. Consulting your dentist is definitely a good move.