A good example of what hes trying to say I found recently was this NFL draft movie(fictional). They were treating this GM flipping his 1 1st round pick into 3 picks like he cured cancer. The music choices are things you'd expect from an emotional high stakes drama where peoples lives were at stakes. Its a tone thing where Hollywood insists on all its stories following the heroes journey regardless of the subject matter.
For example you have most comedys go with the conflict and emotional endings of more serious movies. And it just feels weird as fuck. Another example is this movie about this woman "couponing" and you've got the fat vigilante trying to catch her acting like hes saving the world. The main character of every film has to be a hero.