The desire of lusting after another is fantasy. People create lustful thoughts of another and it involves a realm of fantasy. So no. It is not in how you describe it. In the real world, people who lust after others includes an element fantasy as a part of their lusting after them.
The sin is the lusting and the coveting, not the use of one’s imagination.
Witchcraft will always be condemned in all its forms by God.
I agree, but reading the Chronicles of Narnia is not practicing or endorsing witchcraft.
It sounds like you’re trying to say that “fantasy” aka imagination is somehow wrong, and it’s just not. Our imagination can be used in positive ways and negative ways.
Veggie Tales is fantasy, yet I think it’s very edifying and good.
Green Eggs and Ham is fantasy, is it a sin to read that book to my children?
Elves, dwarves, unicorns, dragons, ogres, leprechauns, zombies, and every single instance of an animal, plant, or food talking is fantasy - are all those wrong and sinful?
Fantasy and imagination are good things that God has blessed us with. I would even go so far as to say that part of being created in the Image of God is the fact that we can fantasize and be imaginative and creative.
Narnia is not witchcraft, nor did CS Lewis promote witchcraft or encourage people to get involved in witchcraft.
You’re being nothing short of legalistic in the promotion of your opinion.