Public transport is great in theory only. With actual human societies - maybe the western ones, that is, except China/Japan - it just doesn't work. Corruption, laziness, bureaucracy, lack of proper planning and security makes the creation and maintenance of these projects unsustainable and so much worse compared to personal transport. This only isn't true for million+ metropolises due to physical constrains.
You may frown at the traffic jams with SUVs having a single driver, but building additional highways is easily doable around the world, while any sort of mass transit infrastructure projects seem to take decades, billions, while still end up underwhelming - if not instantly, then after the machinery ages or maintainers change.