I get what he's saying. Game music used to have a much bigger "job" in fleshing out the world that the game presented to you. I remember for example songs like Final Fantasy VII's Gold Saucer, Chrono Cross' Termina (Another World) that set the tone of the place you're visiting: busy, active, crowded and festive. If you take the music out, you have a beautiful yet static, almost frozen landscape - it comes alive with the music. Nowadays the visuals can be so detailed, the worlds so big and busy that the music seems to be an afterthought: it's just ambient music for the already immersive world of the game. And I believe that has lead to a lot of composers settling for just that: ambient music.

I think on Twitter I once messaged Gareth Coker, the composer for Ori and the Blind Forest, about how beautiful the music on that game is and how there's a big emphasis on melodies. He replied that the studio specifically pushed for melody-heavy songs, rather than just ambient music that only complements the action. That makes a huge difference.