1.) You're oversimplifying and corals are not divided into two groups, nor can you accurately make the statement that "nps" corals tend to be from deeper or deep water.
2.) Many corals are highly autotrophic, and while feeding may be beneficial, direct feeding for corals is often not necessary for them to thrive. It's also very important to consider micron sizes and what the "food" is made up of. Most foods in the hobby, even many promoted to be for "SPS" corals, are too large for corals like Montipora and Acropora. Most small planktonic foods and finely ground food is still too large. This is a VERY important factor when considering what to feed what coral and requires more research than most people are willing to do.
3.) Zooxanthellae is brown or green.
4.) Corals are not humans, you can't put their needs and energy requirements in a human perspective...
5.) All that said, I'm all for feeding corals the appropriate foods. My approach has simply become broadcast feeding large amounts of flake food, some ground in my gingers. It's very scientific!
I'll stop there, but your thread is full of misrepresentations and misinformation and you're presenting yourself as some type of authority and making some very bold statements that are simply not 100% true. Please don't take this personally or as an attack in any way, I just think it's important that we not continue to perpetuate repeating some of the mistaken beliefs in this hobby.
Cheers!