I trust you because youre a pretty good poster. I dont trust the ball-stomping posters ITT, but ok I will give it a shot:
certain performers offer certain kinds of features for their shows. People would have felt scammed if they went to a michael Jackson concert and he chose not to dance. Imagine people going to an Eminem performance and he decided to sing melodical, classical songs and zero rap/word play, people would be pissed.
I do not why its a taboo to point out that certain pop performers, such as peak Britney, peak Christina, and yes, peak Rihanna had sexiness as one of the features of their shows. Thats why they danced, stayed fit, wore certain attires, etc. just this paragraph alone may get me banned or called an incel who just needs to watch some pr0n instead or something. Its not as if the One Direction guys or the BTS guys could have launched their careers by NOT being attractive.
Rihannas formula is a bit of dancing (as in, moving your body!), a lot of showmanship (scenery, lights, bangs, moving elements, dancers, etc), some sexiness thrown into the mix, intertwined with the dancing, and things like that.
being pregnant limited a lot of those possibilities, other than she can still sing. I dont know why this is taboo to point out.
and her rubbing her crotch and smelling her hand was unecessary.
Personally I dislike that she uses too much autotune its vexing and doesn't sound good