I’m pretty sure most of people who mainly use discord as their main social apps probably never touched forum-based internet.
Hosting your own forum is also better as you (the owner of the site) can still retrieve the msgs as long as you still have the access to the host server (so you can back them up in case shutting down, then going to resurfacing later).
Not to mention using discord is already risking yourself because of their shitty policy.