As one who does have such experience, it was plainly and painfully obvious to me as well.
I've seen, (and have also helped) tens of thousands of fish, if not more, saved from certain death with proper and judicious use of copper, formalin, malachite green, prazi, and fw dips, etc.
Hearing all of these hobbyists who are utterly ignorant of the realities of the 'coc' (chain of custody) continue on their simplistic and naïve 'rants' when they have absolutely no clue wears abit thin after awhile
, hence my attempt to point that out with the question.
Not one of them seems to be willing to consider how much they help to add to reef destruction simply by burning fossil fuels to run their own systems-as long as they can complain about their perceived damages from the rest of the coc