People do use public transport. Give real car-free options and people will take them.
Build more roads and people will fill them up within a few years.
Yes, people do use public transport. I use public transport. Not enough people use public transport. I think the "build it and they will come" only gets levels up so far, and the current level is not where it was pre-COVID. In Victoria reducing fees for regional PT is a good start, but I think there are other factors at play.