The refs have to walk that middle ground between "letting them play" and "by the rulebook, that's a penalty". And it's hard to do as players will constantly push the envelop of what is allowed, but if you call everything, the media and fans will get on the ref to disrupting the flow of the game. Can't win.
But, really, I think the emphasis of changing how the games are called comes down to the star players. Can you imagine if LeBron or Durant took a hard intentional foul each time they attacked the rim? Or DL being able to headlock Brady, Rodgers, Brees after a pass?
It's really going to take the likes of Sid, McDavid, Laine, Mathews, Seguin, Karlsson, etc. to band together and be more influential with the rules committee. Right now, all of that is run by the old school boys. Player safety is run by guys who played physical and on the edge. There's no Kariya, Francis, etc. types who won the Lady Byng.