tons of people have the internet too (especially since internet is required for discord)
I understand that it might be appealing to be able to engage with AN through a more social-media-ish system but the forums are optimised to best benefit the community and a discord server couldn't be customised to the same extent. Having a set-up people can ask questions and get answers + feedback
and also see questions and resources going back years is incredibly useful. If discord became the new hub for gettings answers, feedback, and advice, it'd be harder for people to find previous students asking similar questions and giving feedback on there experiences.
I don't use discord so I don't 100% understand how people use it and it operates, but I don't see how it could be better than what we have now. I know you were advocating for both rather than one or the other, but a question asked on discord rather than here means one less resource a future student can find here
Even though I think this particular idea isn't practical, I'm glad you had the intiative to think of one and propose it
(sidenote: moderators generally are other students (admittedly, often at the tertiary level) who started as 'just other (high school) students' who helped a lot)