That cannot be right?! I'd go to another tyre shop with modern 4 wheel alignment gear, that actually know what they're doing, and get it checked again.
You'd expect to see wear on both shoulders with run flats were run under pressure. The outsides look unmarked.
Uneven wear to that degree is not only bloody costly, it's likely dangerous. Those tyres cannot be making full, effective contact with the road.
If had 4x4 that did that and a main dealer telling me that it was 'normal', she'd be gone about a week after the first tyre change.