Did you ever read Letter 210?
http://tolkiengateway.net/wiki/Letter_210
Yes, Tolkien did sell filming rights-—but that does not imply that he would have approved of the final result, as evidenced in letter 210.
“I would ask them to make an effort of imagination sufficient to understand the irritation (and on occasion the resentment) of an author, who finds, increasingly as he proceeds, his work treated as it would seem carelessly in general, in places recklessly, and with no evident signs of any appreciation of what it is all about.”
Letters, no. 207.
(Tolkien, commentating on a screenplay for the Lord of the Rings that he received; based on his letters, that screenplay took fewer liberties than Jackson’s!)
You’re missing the point. If he sold the rights, he knew it could end up being a film very different than he liked.
I live in the real world. They’re books. I thoroughly enjoy them, but don’t worship them and don’t get bent out of shape over the fact that some changes were made. The great thing is we live in a free society so you have the freedom to get as overwrought to the point of crying (as you seem to be) while I can just enjoy the artistry of the films. You might hate them, but I am looking forward to them.