In the industry, you do need some ethics - if one film does well, then thousands get work and money comes back to the industry. I guess the bottomline is, if there are two versions, then the better one will click.
I play piano and guitar and I do write my own stuff so to a certain extent I know what I want to do in regards to music. But I'm still finding out what kind of music is my favourite kind to listen to, never mind do myself so I've got a lot of time to find out myself and develop myself as an artist.