Why is the vampire the lockpicker?

This isn't a real criticism, it's just funny to me.

Under normal circumstances, Astarion is literally incapable of entering homes without an invitation.

But because he's the rogue, if you need to break into a house by picking a lock, guess who you send in? The vampire!

I don't know why I just like the ludonarrative dissonance, and I was wondering if it occured to anyone else that this was a little contradictory.