Just a guess as to what was meant about "fuugo disease." My experience going through art school, was to be shown a specific canon of famous artists. They were our examples of what serious art was. It was all very eurocentric and representative, until modernism threw out representation as a goal. The things we were told to read were very philosophical, and the way artists wrote about their own work was just as wordy and concept-minded. Art after 1960 felt like intellectual puzzles to be solved and show off how clever you were.
For art schools to "belong" among academia instead of technical schools, they had to pretend to be philosophers too. And what got lost was that outside of art school academics, no one stands in front of a painting and does philosophy. They feel it out, they enjoy the sensation of it, they laugh at the dumb jokes. It's why people hate Jeff Koons and Damien Hirst, a lot of art that gets made is shit commodity work that sells (or worse, is advertising) and the closest thing to true art for the people is Memes.
So yeah, if Sakurasaki had the same experience I did, she means whatever academic disciplines Fuugo tries to teach, won't have any human personality in it. Everything he told Gin about color and atmosphere and focal points does make for better landscapes, but also, so what it's another fuckin' landscape.
Don't go to art school, go out and live and read five hundred books and look at the world around you. That's worth more than any MFA. Unless your MFA is Yale and they're introducing you to billionaire collectors. Get that lazy bank.