Afaik this discord is for developers to help developers yes but we have specific channels for that and the 5 minutes is so mods don't have to sit there and wait for you to fix it all day. A strike sucks but it's the consequence for not spending the extra minute looking for the correct place to post it. This discord isn't meant to help you find testers but to help debug issues, talk to fellow devs, and discuss most things Unreal. There's tons of places to find or hire testers but that's not really what the vibe is here.
Conversations don't happen much over in the creations section because developers don't tend to be your target audience (certain great plugins being the occasional exception). IMO that's not really something the mods need to handle other communities (like r/destroymygame) handle that well enough as is.