That's completely not true. Literally, completely false.
Corsets were not harmful to the health. Very few people had tiny waists, and those that did trained their waists down over years, and that wasn't dangerous either.
Corsets not only functioned as bust support, but also offered spinal support during pregnancy (they had special maternity corsets that didn't compress).
Most people wore corsets with little to no waist reduction, and women absolutely were able to choose how much reduction they wanted. Most chose not to tightlace/waist train.
And, it was actually men that were vocally against the practice and not women.
So glad so many other comments were bothered about this anti-corset nonsense!
Why do none of these authors ever do any research whatsoever‽ Given the overwhelming amount of detail given to so much in this manhwa, I really expected better.
Many women were corsets that were the same as their natural measurements!!! Most women did not tight lace!