As a working Brisbane based dad with two University aged kids living with me, we use the car on average once every week or two. I intentionally got a house near a transport hub and several major routes stop at the end of my driveway. If you're within 15km of the CBD transit is very acceptable for primary use. I've also got two electric scooters and bikes and yes the cycling infrastructure could use work but I did a 25km round trip for years into the CBD without too many issues.
There's a bit of NIMBY punishing people who made bad transport choices. I chose not to be one of them.
The study: https://www.nature.com/articles/s41586-025-09431-y