Strange choice ...

I think the logic behind it is that trust are for getting you through the story with no road blocks or waiting for ques. To be able to see the story unfold with your favorite characters as well. Allowing people to get to max level and go back to mindlessly farm things like minions or other rewards uncontested would hurt end game party content soooo yeah, if they wanna do that they're gonna have to work for it.

Can't say I agree with this being the best course of action but I think that's the logic behind it. I mean, tank ques have gotten tons faster after official release so I've been running with parties annnd yeah ... some runs I wish I had just used the trust system as it would have been faster. Making it harder for someone to go BACK to trust kinda makes sense, it promotes party play.