I mean, no one's saying it's a bad thing to be calculated. A certain degree of calculation is necessary to be successful in any field. It's what makes Beyonce who she is.
The problem is that when a person like her does gestures like this, it's hard to not question whether or not it's coming from a genuine place or not. It's sort of like when Taylor, another artist who gets flack for being calculated, invited all those black people up on stage with her when she was on tour. A lot of people questioned whether she was doing it because she really wanted to, or if she had an ulterior motive.
Of course, Bey's and Taylor's situations aren't quite the same. Beyonce has a LOT more to lose, but if she doesn't, the impact will be huge and might cement that legendary status she craves so much.