They didn't have to, but how did it hurt you that they did? I know people in the public eye who have cried for hours over things written about them, trolls think what they say is fun to a fair target. Someone I know had her weight criticised viciously so much because she gained it so she could breast feed more easily, that she deleted all of her social media. She was so upset, and public perception affects your market value as an actress / peformer. Doesn't matter how poor their music is, people don't have to make snide personal remarks about them, and if they choose to strip off and challenge that ( for whatever reason) good for them.