That's the case(thin paint) with ALL Japanese cars compared to European ones. I am not sure but I believe the American brands are approaching the car painting process the same as Japanese one thin layer vs 3 layers approach with Europeans - at least that's what a guy working in body paint shop told me1) The paint is extremely soft on these cars and is very prone to stone chips and scratches. Full PPF is recommended. People in UK that opted for no PPF regret it now. PPF should be applied to any forged carbon roof anyway, or it will deteriorate over time.
Edit : For non-Luxury Japanese and American I believe he said