But how would people getting exp from this matter to you in the slightest?
Anything in an MMO that causes people to take solo avenues instead of group avenues can negatively impact the group experience. This is precisely why they made Trusts as inefficient as they are, for instance. There's still potentially reason enough for some people to use them (insta queues for instance), but there's still many others that won't due to the fact they cannot play as efficiently as a party of human players.