part of the problem is that discord as a platform for this, is like using NAT to make ipv4 work in the modern era. It's just annoying.
Discord even if it allowed public scraping would be a nightmare, because it's search function is practically helpless. Good luck finding a solution as well, that may or may not exist, and that question/answer has probably been brought up numerous times. There is probably specific context around it that we're missing unless we decide to role play as a historian.
Not to mention, it's a third layer of abstraction on top of something that should just be accessible.
I mean sure forums need maintenance, So do discords though, Hardware hosting is barely a problem. Basically anything and any internet connection can host a forum, cloudflare will probably sell it to you for pennies on the dollar even. (though i dont like cloudflare myself)