Prioritising cars actually makes things worse for drivers. We spend many tens of billions of dollars a year on roads in my state and traffic in the cities (and the highways between the biggest population centres in the south east corner where most of the people live) just keeps getting worse. When you give people real alternatives (convenient, frequent public transport, more cycling infrastructure, better planned cities so you can walk and cycle to things you need nearby) that actually gets people off the road and that is the one thing that can reduce traffic (apart from somewhere having a dwindling population).
Focusing all out infrastructure spend and making cars the primary mode continues to make car driving worse, but people get angry when too much money is spent on public and active transport, because “not enough” is being spent on road infrastructure. So politicians spruik their “congestion busting” road spending, and it keeps getting worse. It’s wild.
As someone for whom driving was just the default, I came around full circle.