the mediocre have no right to criticize the great
A proverb meaning that people of limited ability or understanding should not criticize those who are far superior. Often used to dismiss unfair criticism. It is 'sensitive' and a 'proverb'.
As the saying goes, 'the mediocre have no right to criticize the great'; it is presumptuous for amateurs to criticize experts.
From the Buddhist parable of blind men each touching one part of an elephant and reaching incompatible conclusions about the whole. The story originated in India and was transmitted through Buddhist texts in Chinese.