tefilla - Is it right to point out that the Chazzan omitted a brocho in his repetition of the amida?

In this question we learnt that if the Chazzan left out a brocho in his repetition of the amida he would have to repeat the repetition.

Is it right to point out that the Chazzan omitted a brocho?

If he is told, he is very likely to be embarrassed and embarrassing someone is a Torah prohibition, {page 20 column 2} whereas the fixed form of our prayers is rabbinic .

So I might think that it is best not to notice the omission.