I think that common sense is a rare commodity these days. I also think that too many people in this hobby look for minimum standards, such as "what is the minimum size tank can I keep my fish in?", or "what are the minimum number of water changes, or minimum that I need to perform?"
........ instead of asking what is the optimum manner in which to keep my fish?
I don't personally feel that the info that you will gather is pointless, certainly not for you, and your tank and fish, but as previously stated for the most part there are too many variables involved to supply the general public with data that is going to be specific to their personal set up.
Generally speaking, the practical information that you will eventually glean is that in a tank that size, and that number, and species of fish, you will be performing large water changes on a weekly, or even biweekly basis, along with regular filter maintenance, or your water quality will decline and your Oscar will suffer from health issues over the long haul.
I guess I just thought that was kinda obvious, and as you earlier stated "simple stuff to a lot of people". You totally lost me when you stated that this was continually debated. What is continually debated?