1. It's been scientifically proven and extensively documented so in no way in hell does it belong in the same group as astral projections and other new age woo. It's a real thing.
2. It's basically natural VR. As long as your brain can simulate it, you can do it.
3. There's an abundance of guides and forums online providing pages upon pages of different methods for inducing a lucid dream.
4. It's completely free entertainment. And not just in the traditional sense of the word "free", there are no opportunity costs either - you do it during the time you are normally asleep. You are literally not even wasting your time.
5. It's extremely easy to learn - most people pick it up within a week or less of attempts.
People go to way greater lengths to get the entertainment that your brain can provide for free every night. So what's going on here? Why does it have so little exposure even though the vast majority of people have experienced it at least once?