Yeah, I think it's a useless gimmick on their part that's why they released 2DS. I don't like 3D movies as well because it's too inconvenient for me to wear two glasses (one I wear for daily use and the 3D glasses).
It may be because I wear glasses, I don't know. I never could use the 3d feature at all until I got the "New" 3DS XL. The head tracking tech really helped me to be able to use it. But I have been greatly disappointed in the fact that very few games actually effectively use the 3D tech. Street Fighter 2 3d is about the best I have seen on the system so far with the exception of the Mario games. Most of the 3rd party games that I have tried, look flat. There may be those moments, but a majority of the game itself just looks like you are looking into a window that has some depth.