I mean no offense, but I think you did not get my point. I agree with you in general, but LEGO shouldn't have targeted kids with LotR from the beginning because that audience just doesn't care about it. That's where your argument fails: nobody, neither adults nor kids needed those playsets you are talking about. LotR is obviously an AFOL theme with no clear potential among children. Hobbit sets would have been enough to cater for the kids' needs since the related movie is more childish.
In essence LEGO fell between two stools. It picked a very popular AFOL theme and made sets for children from it and now they wonder why it was selling bad. Additionally they released them in conjunction with the Hobbit sets and kids want the ones they see in the movies. The children's market was oversaturated. I concluded that releasing regular playsets was pointless, since I guess that even like this way mostly adults bought them. LEGO should have known this and released LotR only as exclusives, just like they did with the Simpsons.