I was going to go a bit more into this in my next post, but the general idea was that Tanya was told to go to the tavern because it's where mercenaries and other such people would be. She didn't like the idea either but at the moment most of the usual help is already out on missions.

If Tanya sees someone with a horrible injury... at the very least it needs to be confirmed that it'll be dealt with before they get to the dungeon for her to be willing to take them along.