Why not? There are people (including quite a few commenters here I believe) that believe in significantly altering their reality, creating their own realities, creating their own dimensions, shifting to their own and/or pre-existing dimensions, shifting to higher or lower realities, shifting to realities of your choice, etc etc.
As such, why is it so out there for someone to want to “shit to Hogwarts” if that is their idea of a dream universe?
Of course, one might reasonably assert that the process is more involved than listening to a subliminal on repeat, but that might be debatable and depend on the how gifted one is.
I know that the mind is powerful and can do incredible things but going as far as shifting realities to Hogwarts or the things you mention are going too far.
You aren’t ever going to shift to a dimension in world made up in a book written by a human and leave your existence here behind.
It’s good to believe in the power of your mind and yes there many incredible things BUT respecting these wonderful things also means not going so far because that is slightly demented.
You’re speaking to someone who has astral travelled and seen UFOs so it’s not me being closed minded.
This reminds me of a silly synchronicity which I believed to be a message.
So Harry Potter has a character called Sirius and one day I had a dream with this character in it, and I just remember hearing/saying “Sirius” a lot. And the following day when I looked at the forum the sirius energy infusion field was announced (the topic opened for it ). I took it as a q to use it :D