She drove from Belgium to Croatia. She had to cross into 4 countries. With 5 different languages.
Just how far out of it do you have to be?
I once met a man who had been 40 miles off route. He had been hill walking, with a map and a compass. But he thought that the white end of his compass needle pointed north, not the red end. And the landscape he followed more-or less matched what he expected to within about 15 degrees of orientation (our magnetic declination at the time was just over 7 degrees ; it's barely over 3 degrees now). It wasn't until he had gone along two lakes (when the map showed that he should only have gone along one lake), and hadn't crossed either the road or railway line that he realised that something must be wrong. When he reached a third lake, he decided to try to re-trace his route. During that, I met him (I'd seen him earlier in the day with my binoculars and had wondered WTF he was doing), worked out what was wrong, put him outside a meal and a brew, then escorted him back to tarmaced road. I found out later that the local police had noticed his car parked up oddly and when he got back there they were thinking about launching a S&R operation for him.
You don't need to be stupid to end up in that sort of situation. A depressingly large number of people don't recognise when they're getting into trouble, and keep on digging themselves in deeper. Otherwise perfectly sane ans sensible people. Calling them stupid doesn't help.
(My lost man was an experienced hill walker, fit and well equipped. I put in a 10 hour working day making a geological map while he was on his meander through the countryside ; we were both solo.)