To most advanced aquarists, the different water type regions, varying water parameters within large continents, like South America and Africa are well known, and many of these advanced fish keepers can deal with, because of their vast experience.
They are the choir, and hardly need preaching to, by me or anyone else. They have developed techniques that often go well beyond statistical norms, less experienced aquarists can't.
But.....
I don't believe we do noobs any favors , or even semi inexperienced aquarists any favors by espousing those abilities are something that they cannot easily achieve.
If a noob goes and spends $5 on an aquarium strain angel, and puts it in liquid rock, with a successful mbuna tank, that may be "arguably" OK for a minute.
But if that same noob thinks buying an Altum for $60 and tosses it into a hard water, high pH tank, and expect success, that rate may be less than 30% it will last a week.
We all saw the post by a noob thinking a 55 gal gal was being "bold" by cramming an oscar, and arowana, and a number or large cats in that tiny puddle of high pH, hard water.
To me, this is the type individual that represents the reality of who we are really trying to inform,.
And not being succinct enough with certain parameter norms and info that experienced aquarists can overcome, is not helpful .