Sorry about this part but "lol", I always laugh so hard when people tell me LDing is useless.
They may say it isn't real, but hey you can actually study and create things that help out in "reality"/"waking" using dreams, while asleep, without wasting your time unlike they do, so yeah <.<
Also video-games? lol not real, movies? lol not real and so on and so forth, between using time to watch something on TV I prefer to waste nothing by dreaming it.