In the "Movie Corner" I opened a poll about the film scores which got the nomination "Best original score" in the Academy Awards (Oscars) of 1990: Talkclassical best film score award - 1990
This is for the first part of the competition Talkclassical best film score award
Now, the score of the film "The Fabulous Baker Boys" (one of the film nominated in 1990) could be probably classified as Jazz (see for example the first theme) and Intrumental pop (see for example the second theme).
I think that no one would say that this is not jazz music because it was composed for a film. No one would say "this is not jazz but film music". Indeed, film music is not a genre of music: it only means that the music was composed for a film.
However, the other four nominated film scores, I think that can be classified as "romantic music".
Usually, the film scores which get a nomination for the "Best original scores" are more or less classical music.
That's why the radio Classic FM started to insert some film scores in the competition Classic FM Hall of Fame
Their decision is criticized by many people. Read for example this article of the journal "The Guardian": Can film music ever be classical?
The argument of the writer of this article is that film scores can never be classified as "classical music" because they are composed for images and not for concerts (so, it is not standalone music, but a part of the movie).
If this argument is valid, then we must conclude that the score of "The Fabulous Baker Boys" is not jazz because it was composed for images and not for concerts.
However, I agree that pure "motion music" is not extractable from it's context, but the best film scores (the one who win at The Academy Awards) are not simply "motion music": it's music that can be extracted as standalone music. Indeed, the best score composers sell tickets for concerts.
Maybe the real reason of these people is that they think that John Williams is not as good as Beethoven, Mozart, Bach and so on and they see classical music as a "closed enclosure" where you can enter only if you have a special permission.
If it is so, still I don't see the logic: you don't have to be Roger Federer for being a tennis player. So, you could simply say "Peter is a tennis player but not the number one" and "John Williams is a classical music composer but not the number one".
You might say that Bach is the number one and John Williams only an ordinary composer, if you think this, but I don't see the logic of "the closed enclosure".
Someone could for example say that the composer of "The Fabulous Baker Boys" is a poor jazz composer, but it's still jazz.
To conclude, my opinion is that much of the music composed for film scores is good classical music: "good" is my personal judgement, but every one can have his own.
If you ask me "Don't you hear the difference between classical music and film scores?", my anwser is that usually film scores are built around one or more powerful themes, while some pieces in classical music are not so melody focused.
I won't say that film scores don't have their distinticive rules, but that those rules are compatible with classical music, because there are many pieces that are considered "classical" that are built around a main theme.
"Spring" of Vivaldi is a good example.
The idea that classical music must be "chaotic" is only a personal preference of some people and not a rule that every composer must respect.