Another Aussie here who's often wondered about the reasons behind the popularity of drive thrus in the US.
Only local fast food drive thrus are maccas and KFC that I can recall. I've used them when I've been in a hurry or doing a long drive. Not sure they're that much quicker though.
There are a couple of drive thru bottle shops attached to hotels but I had to look them up to be sure because I've never used one. Maybe if I lived nearer, it'd be a handy option. I mostly buy alcohol at the supermarket or local grocery store so maybe not.
It doesn't really seem to be about driving to the shops vs walking. Most people I know drive somewhere to shop, park and go inside.
My mother has mobility issues and uses accessible parking. Drive thru might help for her but since she has to get out to grocery shop anyway, not sure it's be that much of a draw.
Where I live in Oz, there are no really long wait times for prescriptions at the pharmacy or to get money from ATMs. Even inside the bank, it's not usually that long a wait. Plus most of the banks or pharmacies I go to are in malls so a drive thru isn't a viable option.
I don't feel too worried about getting out of my car to use most ATMs outside a mall, even late at night. So maybe lower crime rates help there.
Most people I know get paid by directly into their account these days - fewer pay cheques than there used to be.
I expect that if there were more drive thru options here, some people would find them convenient.
Don't see a driving need for them tho.