I guess Puja wishes Richa were still in the show so people would criticize her instead, like they did before...
people criticized richa for what she obviously did to prashant. she was prashants duet partner and thus her attitude affected prashant to a great extent and made life during that round difficult for him. what richa was being criticed for, was shown, and was canon.
what puja is being criticed for is merely assumptions on people's part, or at least i believe so.
pujas statement here, even if we assume it referred to ankita, cannot do ankita any harm since shes not being made to sing with puja. its a statement and it doesn't even have 'ankita' in all caps written all over itself..
what richa was being criticed for and whats being discussed here about puja are two completely diffrent cases, IMHO.
p.s: i didnt intend to write an essay on richa-prashant here but since you had brought the subject of richa, i had to explain my point of view.