It isn’t a garbage can, and it isn’t a construct imagined by THs to arbitrarily dump content we find personally annoying.
It’s good forum hygiene and forum policy.
By nature, low-effort requests generally aren’t being made by people who’ve done even a cursory search for a “wanted” thread in the first place.
The requests clearly aren’t unwelcome (or we’d landfill them based on Moderation Guidelines), they just need to be consolidated given the limited utility to anyone but the poster.