You make a compelling case Macalaure, but unfortunately in these times of re-versioning James Bond, Sin City, Star Wars, Erroll Flynn's pirate movies, 50's grand Rome stories etc. we need to have something that is already familiar with the fans or having a marketing machine (via McDonalds etc) to make it thus or taking in the hottest nice-guys and primadonnas... Sorry, I don't like to sound like a cynic, but I just can't help it.
LotR was a risk taken and it made a profit, but who would invest millions to try another as there are easier ones to gain money like putting Julia Roberts and Hugh Grant to yet another romantic comedy...