Williams can 'knock out' some catchy tunes?
I see.
You actually hit the problems for writers on the head though. Producers/direcors love tried and tested. They understand what audiences like in an historical sense. Ergo, they tell the writer to sound like this or that. That's part of the deal. These people can't afford to have any imagination or put up with anything that might be experimental or new. Not that I can do either because I can't. They're not in the business of predicting something that an audience will really go for that's entirely original. Most original things in film are accidental and usually put out by an independent company. If it scores big financially then usually what happens is the big studio will pick up on it and then do the big budget copy many times over in different guises - or the big big budget remake. Same goes for all the stuff that make up the film from editing, cinematography down to the score. For example, when they were making Citizen Kane, the studio shiitt itself daily. After it came out, highly original and all of that, Hollywood decided that was the way to go for several years.
But the issue for anyone who gives a shyte is this. Every time these days on forums someone puts up a piece of music, 99 times out of 100 it will be derivative. You will have heard it before almost certainly in a different guise. The tune won't be the same but the entire style and orchestration will be. And that's part of the strength that scoring writers have to be able to demonstrate today. They have to able to copy. If you can be bothered to learn how to copy a style you will probably make money in this field.
On a personal note, I hear a lot of music done with orchestral samples on forums and websites. Imagine if there was no such thing as orchestral samples. How many orchestral works would you even hear in a year. Hardly any. It would be as it was - almost all electronic. That's why a lot of scores pre orchestral sample days were in fact done a lot with synthesizers. And don't think that orchestral scoring with samples started when the samples were really high quality. Any writer using midi and samples would use just about anything of any quality. You think if there were orchestral samples when they made The Terminator around 1982 it would have been electronic?
I think it's extremely wasteful for musicians today to religiously copy Hans Zimmer and John Williams. It never ever sounds as good and simply sounds like a second rate copy. Clever - but boring. But that's what directors want.