Is there anything in the books that simply could not happen in the real world?
Receiving strength by asking a dead ancestor for it is entirely interior to the character. There’s nothing objectively supernatural about it. Musing on the resemblance between someone you think is a saint and a painting of a saint is also entirely interior to the character—not to mention entirely coincidental. And Jungian psychoanalysis is something that people do every day in this world.
What’s fantastic about any of those things? They’re all the interior life of the characters. There’s nothing even implausible about them, let alone impossible.
Is there anything as unrealistic as a woman floating up into the sky because she’s too beautiful for Earth?
(You should probably read One Hundred Years of Solitude, or some other emblematic work of magical realism—I don’t think this is anywhere near “agreeing to disagree,” and it has a lot more to do with simply not getting what magical realism is.)