That's because most any argument among RAW folks where a homebrew person says something like "well you can change it this way" gets a "this discussion is about RAW, not homebrew" response. And the folks who are into the game design aspect and thinking of their own ways to fix things are off in their own threads.Some people desire to follow the rules as written, some want to alter it to their tastes.
But it seems like it's mostly the rules as written folks arguing with each other, rather than the homebrew rule folks arguing with the rules as written folks.
Sometimes the discussions will even set the bounds where when you bring up "official" optional rules in the DMG that could be used you get the same response.
The real issue is that internet discussions about D&D - much like internet discussion in general - is not like real life discussion. It's segmented and self-selected in a way that folks around a table at a con discussing the game wouldn't be.