It had been done recently, without injury, because of the way the move was executed.
The way Sasha executed the move resulted in a fragile Paige getting injured.
Is Sasha to blame? Maybe. Would her execution of the move have injured a fully healthy Paige? If not, then we can't really blame Sasha. Paige shouldn't have been in there if she was right on the edge of breaking.
I feel bad for Paige, with all she's been through, but this wasn't the injury that ended her career -- that injury happened a little while back, and this just finished her.
So sad.
I hope she can be strong, get the support she'll need, and not go to dark places.