
This is writing to house style. More often than not, the script editor (and sometimes the TV producer) will rewrite your piece wholesale. It's not a bad thing - but a lot of people don't know this going in and new writers get burnt (read hurt).
House style means to a writer pretty much the same thing as result-oriented direction means to a director. At some point, you are going to be told what to write. You are not going to be left to your own devices a you are when writing your feature film screenplay.
If you're writing TV, you can bet someone is reading your screenplay - regularly - and really closely. Getting somebody to even read your feature screenplay is the hard part. And for the most part you don't get paid!
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