There were CoP runs in Xi that were way to complicated to run through with AI. There is every possibility that some of us want the combined challenge of finding a group of people and then overcoming something very challenging with them. I mean, I COULD play basketball with myself in real life, but I find it more challenging and enjoyable to do it with a team, since, you know, its a TEAM sport. THose of you that want to play a solo MMO go jump on the Star Wars bandwagon, thats pretty much who they designed that game for. The rest of us WANT to overcome difficult things in a group so that when we finally do overcome them and are rewarded for it, we have someone to hi-five. Instead of what you proposing, which seems to include just hi-fiving myself or an npc that follows me around and only fakes elation for my benefit. I like forming bonds and friendships, not sitting around playing with myself :P
Edit: A *short* list of aallllllllllll the things you can already do solo in this game:
Craft (forced solo)
Local leves (forced solo)
Gathering DoL (forced solo)
Gathering DoL leves (forced solo)
GC leves (forced solo)
Regular leves
Solo XP
90% of the Side quests
And you want to add another thing to this list?