Not the commenter you posed the question to, but I suspect their dislike for the term EDM is similar to how I felt about the term "electronica" back in the 90's

Not the commenter you posed the question to, but I suspect their dislike for the term EDM is similar to how I felt about the term "electronica" back in the 90's when mainstream artists were appropriating sounds and ideas from electronic artists. When the music was mostly underground or found at illegal parties it felt original and pure, but once the broader music industry took notice and started pillaging it for profit it felt dirty and sacrilegious. My preferred umbrella term for electronic dance music is simply "electronic music". This helps make room under the umbrella for all manner of experimental and sometimes undanceable music as well. Death to the over-(sub)-genre-fication of electronic music!