Ayyy we're back! Thanks for braving the genderless wasteland once again for our entertainment Inatrous. Time to sperg once more.
I agree that the way Maia counters Aunt Shari's feminism with an appeal to the academic authority of Patricia Churchland is pretty gross. Maia seems averse to any kind of critical or rigorous thinking in general. Her main criterion for accepting or rejecting an idea seems to be whether it causes her anxiety, rather than whether it appears likely to be true. You've thankfully spared us four pages of an infodump that I assume loses quite a lot of coherence in the process of being lifted from a "neurophilosophy" book, filtered through Maia's low-IQ yaoi mush brain, and put in comic book form, but I assume most of Churchland's book has nothing to do with "genderqueerness" and Maia is just cherry-picking any part that seems to defend all the opinions she had already held before reading it, assuming she understands it at all.
To be fair, though, I don't think Aunt's Shari's concern, although a valid feminist critique of the non-binary trend in general, really applies to Maia. It's not so much that society's devaluing of women got into her head - in general I find Maia spergishly oblivious of what society thinks of anything. Again, I think her problem with being a woman is A. fear of adulthood and B. hatred of her physical body. What she really needs is some 1990s-2000s body-positive Vagina Monologues type feminism. As a little shithead teenage boy in that era I thought it was cringe at the time, but my god does the idea of accepting and loving your physical self, even when it's imperfect, seem so wholesome compared with the post-2010s idea that everyone has a right to do chemical and surgical experiments on themselves until they have the ideal body.
As for the pronoun stuff, you're right on that the "pebbles in the shoe" metaphor doesn't work because what she's really asking is for other people to constantly take the pebbles out of her open-toed sandals as she drags her feet through a gravel pile. She can maybe train friends and family to modify their language at least when she's around, but strangers are always going to clock and "mis"gender her. Again, we come back to the fact that it would be much more realistic to just accept reality the way it is instead of trying to force it to conform. I really wish someone had given her the Tao Te Ching instead of Neurophilosophize your Way to Genderqueerness or whatever. At its most basic level Maia's problem is that she's an anxious ruminator who expects the world to change whatever it is that's bothering her. I've seen no sign that she's even considered the idea of letting things go and instead changing her own perspective and reaction, you know, things she can actually control.
And finally, aside from all the theory sperging I just want to take a second to make fun of Maia for her reaction to overpriced Harry Potter backpacks that make it look like you're carrying a huge, immobile owl around on your back for some reason. The whole thing is so clearly pitched at kids, from the way they call it an "adoption fee" to the lame joke the shopkeep presumably makes every time ("It will always have your back!"). A normal adult would roll their eyes when the guy says "$40", not have them turn into hearts when he says "adoption fee". Maia is such an embarrassing, squealing, dopamine-mainlining, cartoon heart besotted dumbass whenever she sees something childish and mildly cute she can consume. It's the boys' underwear scene all over again.
The irony is that it's women who more often get a pass on this kind of arrested development being still cute into their 30s, whereas men who do this shit at the same age as Maia are (rightly) considered turbo-losers. Enjoying that female privilege Maia? Personally though as I've said I think her whole nonbinary thing is an excuse to stay a child forever, that's the true "third option" she wants, not woman or man but eternal sexless child.