The first part of the explanation you gave is a way of seeing it with a precise interpretation behind. That's the mechanism but what can somebody conclude without that background?

what i was thinking is that emptiness is part of the experience of the mind and it can happen in everyday life without aknowledging that. As you said LD shows directly how the mind builds itself the reality. What i was really wondering is if most of the people that experience that come to apply it in everyday life (in a simple way like if dreams are so real, reality shouldn't be so different from a dream, why am i so sad for that stupid thing? why am i so attached?) without having any knowledge about this kind of concepts.
Also like meditation in general has lots of clinical applications for mental disorders (depression anxiety ext.). Could it be the same for lucid dreams? Doing the same they did with mindfullness meditation and use it to improve the relative condition of people.