This is somewhat true but they are politically incorrect by design, engaged with where the culture is but in a trickstery sort of way. Deadwood is different it seems to me, drawing on a sort of gritty world-historical humanism that stands apart from the current conversation.

The more I think about it though, the more I reckon Deadwood is just very unusual in its treatment of these issues, not necessarily stepping more over any lines of decency than a bunch of other shows.