I would literally never let an AI plan my trip. I do have very specific interests though and it's nice to have an overview of suggestions of places to go.

Plus, it's great at researching the history of places you're visiting, so you can find cultural experiences a bit easier.

I don't travel often, but I do live in Europe where it's easy to visit a new city or country in the weekend. This makes this functionality a quite common use for me.