the US is a gigantic country, so there are different practices in different places. I have never left my door unlocked, but maybe others have.
It’s not that big mate
It is nearly as big as Texas….so quite big.

ERM

Texas is larger than Victoria and the Australian Capital Territory (ACT), but smaller than all other Australian states.

If Texas were a state in Australia, it would rank as the sixth. Behind New South Wales, Queensland, Western Australia, and South Australia.

Erm… Not that big

ACT isn’t a state

I don’t believe that was claimed?

Northern territory also

They said “all other Australian states”