[Rhod the Red]

Well I don't recall that many goblins killed in the Hobbit chase out of the MM.

I guess you could say it was done for visual entertainment. I found it appropriate. But then, Toklein no doubt had the minor audience in kind at all times. EG; the narrator continues right up to the Battle of Five Armies part in the book.

PJ knew there'd be a mix of minors and adults, so logicaly mixed appeal for both kinds of audiences. Children that watch these finds of films aren't dumb or mentally vulnerable, so one can't make an anti-exposure argument.