Honestly if they aren't bots a lot of them may as well be. So many reddit jokes seem to be just parrot something & feel good for being part of an in joke regardless of if it is even funny in the context they're posting it. This extends beyond jokes for general talking points too. The amount of people whose discussion feels like it's limited to this person says x talking point, now I say Y talking point in response and back and forth is annoying and like you said tiresome.