[timmattison]

Sure. But when you first join there is no history which means that anyone new to the channel would ask the same questions because there was nothing they could search.

[magicalhippo]

Exactly, and it won't search for stuff that was written when your client, or the bot, wasn't running.

Sure, you could set up bouncers and whatnot. But it's a barrier that Discord doesn't have.