I think a lot of the topics you mentioned are subjective.
Everything is subjective from a human experience :)
One can even argue that it isn't that much different to reading from a fiction book
It is quite different from the creative aspect, as when reading, the brain generates the imagery itself, essentially creating a new world with an individual perspective. No two are ever the same. When feeding from images and video clips, the thought is far less rich, and everyone consuming sees the same.
I guess a good discussion is what determines the value of what someone is doing.
Absolutely. Yet, I think we are becoming less able to do this for ourselves, because we have been conditioned to be consumers. So, we will value the entertainment more, because we have been taught to. Just like any religious indoctrination.