...People poo poo EI often for the water change aspect, but give a blank check to ADA regarding water changes. Discus folks, fish breeders, many fish keepers always did weekly or 2x a week water changes IME. Never hurts to do one and only helps.
Also true, if you look at pretty much all good light, dosed tanks that have the wow factor clean water via the water change is pretty much standard practice. I think the WC is overlooked more with a ADA since it's a complete system and just one think that is needed. The dedication to the tank is still key and it's not a self-sufficient system as "some" continue to preach.