Fionna’s job makes no sense

In the first episode we see Fionna’s job is to give bus tours which consist of facts about the city and not many stops? Are the citizens of the city riding the bus for the tour? Its presumably the same script every day, so if the same people ride the bus to get around, that would get annoying. It’s not for tourists, because Fionna’s city is the only thing in their universe. My point is there is no reason for Queenie to employ Fionna especially for such a penny pincher. It’s not really important to the show, just bothered me on rewatch. My only theory is that some of the riders are normalified candy people and theyre so dumb they might enjoy the bus tours even with the same script every day and Fionna’s monotone delivery.