Okay. Stop arguing.
My opinion is that most musique concrete musicians are completely pretentious and somehow managed to bullshit their way into claiming this as "music." I wouldn't go as far as to call it music, BUT what I would call this is a series of very interesting sounds that are revolutionary for its time.
TL;DR: This isn't music, but that doesn't mean it's bad. It's a very interesting collection of sounds.
You may now continue arguing.