Those are completly valid problems with my statement, we might have different perspectives and wont find agreement, i accept that and still love you and anyone who chooses to consume the content. Ill also say that i was major harry potter fan in my youth, went to the book and movie releases, etc, etc. Harry potter had a special place in my heart.

1a: the distinction between mind and soul is one better discussed in person over hours and hours, ill let you choose whichever fits best within your model of reality. But as far as unhealthy i mean it in the same way as getting mcdonalds - even if you get a salad and water at mcdonalds, you are still reinforcing a pattern where mcdonalds is an acceptable place and source of food, even when we know the food isnt healthy and how they source the food isnt healthy (references to slavery, abuse, theft, environmental degredation, etc - if unfamiliar with these concerns from mcdonalds and other fast foods ill make it your homework as itd be a lot to type out and im no expert to speak authoritatively) - harry potter has a number of stereotypes and problematic areas baked into its universe - maybe eveb innocently from jkr's perspective - but weve seen what shes manifested into - and further - because of the links and references to other issues it can soften your rejection of other harmful content (for example, theres a very specific representation of goblins in harry potter, and becoming familiar with that representation, innocently, can make you desensitized to other problematic sources that move that interpretation of goblins to antisemitism, just one example of unhealthiness i talk about)

1b: this is what i reference to as underlying patterns, by watching the new hp, is a knife going to jump out of the screen and stab you? No. But you might internalize some concepts from the universe and story that later forms the seed of hatred, or sends you on a path/rabbit hole that does do damage to you. in a certain perspective im sure someone would call that psychically. Just as one double cheeseburger dosent kill you on the spot and even tastes good, in aggregate and over time and repitition, it will decrease your quality of life and if unlucky, might actually kill you.

2: have i consumed unhealthy content before? Certainly and plenty of it, further its likely ive consumed unhealthy content even today unknowingly. But i am now aware and am actively trying to manage the content i consume and being more aware of how it can influence me because i want to think and act in a certain way, and that requires dilligence, just as im dilligent about weeding my garden, just as im dilligent about going to the market for groceries and not going to mcdonalds. I didnt know jkr was hateful as a kid, but now i do. I cant and wouldnt change the past, but i can and would change the present. Its what we do now.

I hope that answers your questions, i dont know how to make my answers shorter, and typing this on the phone is exhuasting, this is a conversation better had with voice and a back and forth dialog.