Kings 21:23
And of Jezebel also spake the LORD, saying, The dogs shall eat Jezebel by the wall of Jezreel.
Boobs (or rather, nipples) get blurred on network television, which are bound by FCC regulations. Violating the FCC can bring massive fines. The FCC fined Viacom $550,000 because Janet Jackson's nipple was exposed for a second during the Super Bowl. Cable television isn't bound by the FCC but advertisers still pressure them to follow the same regulations. Premium cable television like HBO answers to nobody, so Game of Thrones can be as gratuitous as it wants to be.
Miller was right.