Music critics and celeb judges might have different/unclear obligations but the point is that they both make their observations in the public domain and maybe even the same performance/programme. This point has been made before, but bears repeating.
Since Shaan's obligation is towards the show, it includes the job of encouraging all participants in an unbiased manner. Any bias shown by him towards any contestant will lead to him getting fired from the post of anchor, is that so difficult to understand? There is no question of firing celebrity judges, so they are quite free to say what they please, as long as they don't worry about garnering brownie points.
Celebrity judges are therefore free not to follow or to follow the book of interpersonal communication skills that certain skilled debators might need to look up frequently in order to maintain peace in their workplace.
"they both make their observations in the public domain and maybe even the same performance/programme"
but they have different obligations when commenting/ writing their piece, dont they? did we not decide that above? we do understand that the question of obligations is an important one, dont we?
"There is no question of firing celebrity judges, so they are quite free to say what they please"
at the end of the day, most of us are free, arent we? question has never been about the right to freedom of speech, it has been CONSISTENTLY about whether certain feedback is appropriate in certain contexts.