I have heard this before and thought it bull pucky then and still think it bull pucky. Most entertainers(writers, actors, musicians etc...) do what they do because they enjoy it and want people to enjoy what they do. One TV can be "consumed" by billions of people. It's not like suddenly because you didn't come up with an idea entertainment will cease to exist.

I will explain the theory I heard and you can say yea or nay if it's what you heard.
If more people consume than produce than we will run out of goods to be consumed. So if I read a book without producing my own work(book, movie, play, music etc...) then I have given nothing back for the privilege of consuming someone else's work. If there are more consumers than producers then sooner or later there will be no entertainment. Also it's rude because you are only being a taker.