Does it bug you when creatures that logically shouldn't have breasts are illustrated with them in D&D art?
In the previous edition, Dragonborn, Minotaurs and Shard born females were all given breasts, even though Dragonborn are reptilian, Minotaurs would logically have udders, and Shard born aren't even biological. I think monsters and PC races should only be drawn with breasts if: 1) they would logically have them, or 2) they are traditionally depicted as having them. What do you think...?
1) "Logic" isn't really a good argument in a game with dragon-people, mythological beings, and animate crystal people. None of those things are logical to begin with.
2) Those things in 4e are all PC races. When you play a character, it should be identifiable to you. Female players who play minotaurs and who want to do so as female minotaurs shouldn't have to imagine some totally alien anatomy every time they want to climb a ladder. Characters are also often representations of aspects of the player, so having human gender signifiers is important because the players have those signifiers.
It's fine. More than fine.