I dunno. Probably because I'm one of the .1% that notices and I figure if you're going to go that far into detail on something, might as well go the whole nine yards.
This is my argument with so many things in movies.
If you're gonna make over the top sets and costumes -- why NOT try to make them right? It's not going to cost MORE to make them look proper, and (especially if you're doing a historical piece) you will avoid the risk of alienating a major market -- people who KNOW and care about that period.
I'm looking at YOU, Tudors, and Elizabeth, and Kingdom of Heaven....