Honestly do some people still not get the concept of "if you have nothing nice to say don't say it…

Honestly do some people still not get the concept of "if you have nothing nice to say don't say it at all?" Like we are all future moms or are already moms just looking for advice and people to relate to and to publicly and rudely comment on something someone has said is not what any person needs! We are already fragile hormonal human beings! We do not need the negative feed back..