It is a good motive, fame and money, as it is tangible and measurable. Being an artist is neither measurable nor tangible and certainly not a way to become rich.
Films must all have the same structure. All of this to guarantee box office bonanza, which of course it never does, but that's another discussion entirely.
I am very abnormal... But it wasn't very long ago that I wasn't so abnormal. I was very normal and headed for a lifetime of paying medical bills as proof of my normalcy.
Harrison Ford was pretty content as a carpenter who thought it would be nice to work on TV and ended up being the biggest film star in the history of cinema.