Within the city, it's not like people who already own cars instead use rideshare apps; it's that for anyone in the city who might have used public transportatio

Within the city, it's not like people who already own cars instead use rideshare apps; it's that for anyone in the city who might have used public transportation, a portion have opted for the rideshare apps. And that leads to the effects parent et al are talking about: increased congestion and all its side effects. Bike use and bike sharing, while decreasing public transit use, have similar positive benefits to public transit use such as reduced congestion, reduced pollution, etc.