I've seen the "disabled people obviously react to disability by trying to spread it around and become villains" thing a few places before. Not sure what's going on here. Abled people have weird ideas about us.

Like I read this book once where there was a society living alongside humans who had telepathy and used it for all communication among themselves, and there was this man who lacked the ability to communicate that way which was a very obvious disability parallel, they referred to him as deaf and everything. And they had him go... crazy I guess... from isolation and from being outside his society and iirc he ends up trying to find a child to cut the... appendages they use for telepathy off of to get them grafted to himself. It was. Weird. And unsettling.

I didn't think much either way of Jenny at the time when I watched the seasons, I think. I see what you mean about it being sort of Designated Woman To Ask Out. But also I can see her as Giles wanting a... tamer replacement of Ethan, which is interesting and I kind of want to write angsty fic now?