It’s about a resource-pool of players with shared interests which you could potentially always try to tap into.
The LFG tools as well as the open world of WoW nowadays are largely populated by completely random people you’ll likely never see again.
The interest being to put a more personal note to it again, potentially getting to know the others in said resource-pool, etc.
Compare it to ingame-communities like the “Haulers Channel” in Eve Online.
I’m afraid you misread the intention, but I see how people could get confused / scared away by it.