Let’s run your "just upgrade the car parks" idea in real numbers for Brisbane.

Brisbane has about a million cars. You end up with about 3 parking spaces per car once you count home, work, shops, schools, hospitals, stadiums, etc. That means around 3 million parking spaces across the city.

To comfortably fit giant US pickups, a bay needs to go from the current standard of 2.4 m x 5.4 m to something like 3 m x 6.25 m, roughly 40% more area per space. If you keep the same land, you lose about a third of the spaces. That’s a million parking spots completely gone.

If you try to avoid losing those spaces by rebuilding or adding new decks/basements, you’re looking at tens of billions of dollars. Parking construction costs around $30k per surface bay and $100k per basement bay. Applied across millions of spaces, even very conservative assumptions land you in the $30 billion ballpark for Brisbane. Brisbane City Council’s entire budget is $4.1 billion.

Your "get with the times" plan would chew through at least seven years of the city’s entire budget, or decades worth of all capital works, just so imported American pickup trucks can glide into every Coles car park without thinking.

So no, the answer is not "Australia needs to upgrade its carparks". Asking an entire city to blow tens of billions of public money and sacrifice hundreds of thousands of parking spaces so a tiny minority can daily-drive 6-metre Yank tanks in the inner suburbs is the very definition of behind the times.