Well, I suppose WILD you like you said it would gain something from the inability to fall asleep properly. But one probably doesn't want to intentionally induce illness to gain lucidity. Like atleast personally to me it would be a bigger negative to be sick ( I hate being sick and not being able to exercise, meet with friends, function properly and feeling over all bad ) even if it helped me get a lucid every night. It is easier and more benefitical to stick to regular training

I have never had any good dreams when I've been sick. Actually most of the time when I'm sick I don't remember dreaming at all, my body and mind is just too exhausted fighting the illness.