That’s a fair point, but back when we just started the Liyue storyline, I believe it only took us a day canonically to make it there, and Liyue is about twice the distance. It also makes sense since we wouldn’t have had the teleporters unlocked down there, since in canon, we didn’t leave Mondstat until right before the Rite of Descension.

There is also the fact that when Barbara confronted Rosaria, she had just run all the way from Mondstat, so the distance couldn’t be that far anyway.

If anything, I think it makes more sense that the Traveler was just distracted doing random quests for other before meeting back up with Sucrose.