Do you think this was the case so that the movie industry would have something to market on mainstream radio so that people could associate with the movie? I could be wrong here, but I don't believe that soundtrack recordings nor do I recall hearing much of orchestral soundtracks on the radio prior to Williams and Star Wars. Soundtrack markets appear to be more prevalent now a days compared to let's say 20 years ago.
Part of it was that I would think. Take a film like The Man Who Knew Too Much (1956) for instance. Why would Que Sera be in film like that for no other reason to make the producers money and for publicity. This went on for ages in films and Butch Cassidy and The Sundance Kid is a prime example - that western is almost a musical.
I saw The Bourne Ultimatum for the first time last night. It was on TV and our national TV guide, namely the Radio Times gave it a 5 stars rating (maximum is 5 stars).
I thought - my goodness this must good then. So we watched it.
After about 10 minutes I felt sea sick and there was a low droning noise going on all the way through the film that I later realised was John Powell's score. I thought there was something wrong with the TV. The film editing was a constant click click click and in the end it was like watching a crappy Channel 4 docu-drama. Nothing wrong with the actors but Paul Greengrass couldn't direct his way out of a paper bag. This is the type of cynical crap that's produced for the great uneducated teen audience - including wankers that work for the Radio Times. If they'd put a song in that film it would probably helped it a lot and I hate songs in films.
The mistake all directors make these days when attempting to make thrillers is they always forget humour. All the great thrillers have humour. Constant film editing and a constant drone does NOT give a film pace. It just makes it a mess. 2 hours of any film is not real life for sure, but 2 hours of 30 edits per second is a fucking headache.