I have made this same argument with others before. They think that because it is in a fantasy setting, that the sin of magic or sorcery does not exist as being bad like it is bad in our world. I have tried to compare it to them watching porn (Which are the sins of adultery and fornication) and they say that it is not the same thing because the sin is actually being recorded. But I said what if it was a cartoon? Would it make it any better? It would still be promoting the sins of fornication and adultery. They really did not have an answer or a good response in reply (as far as I can recall).
I believe we live in a culture that worships entertainment, and so it is hard for them to break away from such things. I accepted Jesus Christ as my Savior in 1992. I was on fire for the Lord and told everyone I could about Him and wanted to live for him. I was a young teenager at the time, but the idea of putting away watching all movies, etc. was too much for me to grasp. Granted, I did throw away my comic books out on the street because of the many sinful things within them. I was on fire for preaching God's Word, but I did not give up entirely everything like movie watching. The world of entertainment was still ingrained within me. In time, I started to think I could be rich and also serve the Lord, but this led me towards more worldly thinking and less towards the thinking of the ways of God. I always believed in Jesus as my Savior and wanted to lead others to Him, but I was caught up in the things of the world. When I rededicated my life to following Christ in 2010, and I started to really study my Bible and to always discuss it with other believers. This was the time within my faith where God started to prune out some of the bad things in my life. After I rededicated my life to Christ, I could not watch things like Harry Potter, Doctor Strange, and or horror films, etc. But I still watched secular sinful movies (Including the Avengers). In October 2016 (after I watched Luke Cage the TV Series), I put away all sinful secular movie watching like Star Trek, Marvel comics films, etc. altogether. I could not take all the sinful things that was being pushed upon me anymore. It was becoming too much for my soul to bare. Once I put away my secular sinful movie watching, I was able to see them for what they were. For many years of my life I remember enjoying to read about a character named "Daredevil" in Marvel comics. I even enjoyed the TV series a lot (back when it came out). But when I put away all sinful movies out of my life (Which was not easy), I was able to see that I was watching a show about a guy who dresses up as the devil. At the time, I could not see it. But after putting away the junk, I could then see.
I now only watch Christian films that inspire a person to want to follow the Lord, and educational nature documentaries. But a Christian still has to be careful. My wife and I watched a TV show called "When Calls the Heart" (that is labeled as Christian) and it started off in a good way with them quoting Scripture and them having a minister character, etc., but now on the show that has stopped and they have promoted magic very subtly in one of their episodes, and they promoted that the sin of lying is okay. So I told my wife, I am not watching that show anymore, and she agreed that it was not good to watch it, as well. So we have to remain ever vigilant on what we watch as believers.
Anyways, there are good Christian films to watch as an alternative. If you are interested, here are a list of Christian films that are my top favorite that I believe inspire a person to follow the Lord.
What Christian Movies Do You Find To Be The Most Rewatchable?
I included trailers and poster artwork, and where to rent these films in
post #2 and
post #3.
I hope that what I said here helps;
May the Lord Jesus Christ bless you today.