They are what you make of them. Other people will do different things, and have different ideas. If you are saying that something a person chooses to dream is abuse, what are you really saying? That thinking what they want to think is abusing their mind? That they are using their imagination incorrectly? As for your other points, genetic and collective conscious are unsupported by science as far as I know, especially since dreaming in general is a weak point in our scientific knowledge, so you will have to judge whether you believe in those things based on the personal experience of others and yourself. Finally lucid dreaming is more of a skill than a gift, and almost anyone can learn it.