First things first, you are an amazing and hard working writer and I adore your sense of humor. Secondly, i wonder why did buttons parents object to them enrolling at Aeon? I understand the safety side of it—for both Button and the organization, but at the same time they also seem to encourage Button to look past thier mindblindness and believe in themselves. It just seems kind of contradicting, but maybe I'm missing something.
Aw, I’m blushing! In regards to your question (which is a great one!), John and Hope are somewhat stereotypical. Parents often claim to have faith in their children, but then will encourage their progeny to stick to safer, more secure choices, especially if they believe a choice has the potential to make their child unhappy (or they secretly doubt their kid’s ability to handle adversity despite outwardly being supportive).
Their pushback over Button’s enrollment at Aeon is similar to the pushback one might receive upon telling their parents that they plan on studying, say, theater tech and interpretive dance at university. Hope and John are concerned that Button may eventually regret the decision to join Aeon, especially if anything goes sideways. Coupled with their residual guilt over leaving and unavoidable worry that Button may be choosing a dangerous path in order to follow in their retreating footsteps--their resistance makes sense, even if it doesn’t make for A+ parenting.
Kids often expect perfection from their parents and become disillusioned and bitter when they inevitably realize that parents are still flawed people who simply happened to procreate (see: resentful Buttons). Likewise, parents often underestimate their children because it’s their baby damnit and must therefore be guided into making the right decisions. Other than the psychic stuff, it’s a fairly common situation.
Contrast Hope and John’s attitude with Nick’s, who’s in total support of Button’s decision, and you get at the root difference between being a parent and being an older sibling. Nick may be protective, but his view of Button’s capabilities is more realistic (or even over-estimating) since siblings usually have an easier time seeing each other as humans than do parents and children.
I pity Nick’s eventual kids, however, since he’s already like 87% that dad who honks from the car and hollers “I LOOOOOVE YOU!” out the window during school drop-off.