And why do they not mind bad quality?
No matter what you think of Natan's designs in terms of taste (and IMHO, his choice of colors, prints and details is for the most part perfectly awful), his clothes are obviously badly made:
Weird seams, shifting necklines, uneven hemlines, embroidery of the crassest kind, inferior fabrics used, and most regrettably of all, a very bad fit.
His concrete stand-up collars, his short square jackets over skirts with inverted pleats, his glued-on looking candy applications, very rough and stiff draping, the too busy prints and the too shiny materials do not exactly add up to an overall picture I'd call elegant.
Whenever he attemps some more difficult tailoring, like evening gowns with elaborate skirts ending in trains, the result is an inevitable failure.
Style-wise, he mostly copies designs from the 60s, influenced by the likes of Courrèges, Givenchy Balmain and Oleg Cassini, and he repeats a few signature details indefinitely which makes his stuff most repetitive.
From my point of view, he has single-handedly managed to ruin the look of Princess Maxima, Princess Mathilde, and GD Maria-Theresa over the past few years - or rather, the ladies' own decision to constantly wear Natan has.
Queen Silvia and CP Victoria seem to wear individually fitted Natan pieces, personally made in better fabrics instead of off-the-rack, and this, along with the fact that they only wear his clothes from time to time, almost saves their appearances in Natan.
But all in all, I consider him to be the worst royal dressmaker of them all... more a disease than a designer.
The virus has been spreading for years now, and I just hope the royal victims get it under control one of these fine days.