I don't know why skipping this is a problem, though.
People gather in places where they have things to do, and disperse all over the place or concentrate in hubs when they have nothing to do (but only queue content). Or they travel strictly to their destination (like dungeon / raid content without ports). Why is it important that they get stuck on the way because some random mob dismounted them? What fun / excitement / pleasure / new experience is to gain from that? What new thing whill the player learn except probably the aggro range?
Such kind of "content" does not contribute to a meaningful experience. I don't know anyone who thinks that getting dismounted by a random mob between start of your journey and its destination is somehow meaningful. It's usually also not dangerous at all, because they cannot create a world which is dangerous for the top geared / skilled players without alienating the larger share of players, who don't meet one of these criteria.
They should stop trying to force the open world into the dungeon pattern. And people shold stop encouraging them to do this, because it's a pointless, and probably even toxic thing for the game. You know, we have dungeons and raids in it. Open world should be a different thing.