It's a valid concern to have, that people might start to rely on lucid dreaming, and spend more time asleep than awake if they could. We can't lie that it's tempting: to spend more time in a world where you control everything.

That lucid dreaming can become addictive, well, I can tell you that the problem with addiction lies not in the substance, but the person themselves. 9/10 times this escaping behavior is being applied to other areas of life. Even social networking can become addictive if you're not careful.

What really messes people us in this is that they don't know some things can be addictive, or they just don't care enough about themselves to be careful. You already have that covered, so I wouldn't worry. Since lucid dreaming can help you in problem-solving, rather than looking it as your escape tool, look at it as something that can help you improve your waking reality. That's the main reason why I want to learn lucid dreaming: how to help myself in real life in ways I wouldn't be able to before.

I hope that helped clear up some confusion.