It’s actually a sentiment shared by many of my coworkers and B has gotten feedback from the supervisor about it in the past before. She doesn’t have any intent on changing tbh. I know that bit because she brought it up to me (not because I was calling her lazy).
I just don’t really personally care much about whether or not someone doesn’t work as hard as someone else…unless they are also a shithead lol. Which she isn’t so it doesn’t bother me. Or if she was maybe gone for like half the day I might care.