***Yes sir, though I fail to see the relevance.***
OK, so here is the point.
By your own admission you don't want your kids to read a book with actions and behaviors you find unacceptable - even if it is FANTASY.
So whether a work is "fantasy" or not is not the issue. The issue is the moral nature of the content. Else wise you would be OK with the druggie/prostitution book as long as it was "fantasy".
There are certain types of content you find morally unacceptable - drug use, homosexual prostitution.
The Bible makes it clear that certain types of behaviors are morally reprehensible to God - in fact He finds them to be an abomination - things like witchcraft, occultism etc. The Potter books are literally packed with this stuff from start to finish.
Problem is, you are allowing your moral sense to be guided by something other than the Bible. You have a standard of acceptable and unacceptable behavior (that even applies to works of "fantasy") but you are using your own code of morality and not deriving your sense of right and wrong from what the Bible reveals God's opinion to be on this issue.
Yes, there are certain themes I believe would be damaging to children, and others that I find overall quite harmless. Letting kids entertain themselves by imagining flying brooms, invisibility blankets, etc. doesn't bother me. It's all harmless fun.
And as far as using my own personal morality code, I believe God gave me a brain for a reason, to think independently and act on what I feel is right. I pity you, never allowing yourself anything in life before checking the Book to see if you have permission.
"The Potter books are literally packed with this stuff from start to finish."
BUUUUUUUZZZZZZZZZZ
Wrong across the board. There is absolutely NOTHING in the Potter books that even vaguely resembles any activity proscribed by God. Magic in Potter is purely genetic, some people can do it, some people can't, they don't practice any occult they simply control a mutant power they have. Everyone that says Potter teaches occult either never read any of it, knows nothing about real world occult, or is just plain lying.
I think that says enough all by itself - nothing need be added.
The difference is that drug use, sexual promiscuity, homosexuality etc. are things that kids can engage in.
Becoming a wizard or sorceror is not something kids can do, no matter how hard they try.