At least that is what happened to me in australia and I only had a year of driving practice back then, but driving on the right side was already deeply ingrained and I had to be really aware of what I did.

But to be clear, I am not arguing models have real understanding of anything - I know they don't. My point was humans can be similar in pretending to have understood something, but if their core was modeled different, they will fall into old patterns again quickly.