I have never once said that the industry side of the hobby is promoting big water changes, just that some of the IDEAS about what are good practices and what constitutes good filtration have been skewed very much in favor of generating a consistent revenue stream by those promoting some of this merchandise/methodologies.
Now how that impacts things like water changes is simple to my mind.
If company XYZ Inc. is selling and promoting a certain type of filter that uses proprietary media with the intention AND instruction to change the media at regular intervals, while on the surface it sounds like good advice, from their perspective, the advice is designed to drive further repeat purchases, and the filters are often not adequate to actually fully meet the needs of the hobbyist. So then they resort to doing huge water changes in order to maintain water quality because that is what they hear from places like this, when in reality maybe all they really need is a better filter and not to listen to the advice of the company that has their hand out waiting for $$$.
I can see the interconnections, if others do not, I don't really know what else to say to illustrate my point.
At this point I feel as if I am