If the growth is slowed via less light, no CO2, then you need no water changes, waste is less than the demand, and we can add a bit of ferts to ensure plants stay healthy, then export/trim them as needed.
It really depends on how impatient you are.
We want the plants to grow faster, so adding CO2 will increase rates by 10-24X. We add ferts like in farms to grow the plants faster than naturally enriching the soil over many decades.
As far as "inventing", I never invented water serial dilutions, nor did I invent dosing fertilizers. I promote and advocate using them to avoid water testing and keep the tank clean. I've always suggested 50% weekly water changes since I kept fish in the 1970's. Never had an issue, easy, simple to do, same with the clients, customers, LFS I worked at as kid etc
Certainly easier than learning testing, water chemistry and doing all that.
I can automate a water change, I can make that very very easy, anyone with a little plumbing skills can for that matter, I cannot automate water testing.
As far as extreme, nothing like hyperbole, Discus keepers routinely do 50% 1 to 2X weekly, some even more, so do most fish breeders. Amano does weekly 50% water changes etc. I guess Amano, Jeff Senske, David Oliver, myself, most every ADA contest winner in the top 100 are "extreme".
Maybe it's not "extreme" and that there's some good common sense to it is more likely the case..............
As you gain skill, you can get away with less frequent water changes, the time difference between 50% and say 20-30% is not that much, and I clean the tank, trim, clean the filters and other general maintenance while the tank refills. I'm not sitting there, waiting................it's also a lot easier to work and trim on a tank with 50% of the water out of the way.
Still, I have little issue eye balling the plants, the tank's health and deciding if I can avoid a water change, and I do sometimes, I've gone many weeks without any on CO2 enriched systems. We all do.
But there is less risk for anyone with more consistent frequent care.
That is just plain simple common sense.
But there will be those that argue against such common sense.
How can I argue with that? hehe
Nano reefs do not need skimmers and all the equipment if they simply do weekly 50% water changes either. Same for larger reefs, but the salt cost $$ and the water needs pre mixed. But it is far simpler and rules out many unknowns. Still, for smaller systems, water changes makes life quite easy and the tank's health very nice indeed.