Fundal massage is standard protocol, and should be done in all births. It's a part of the "active management of third stage" which is encouraged by the WHO. It prevents uterine atony and PPH. It is an imperative part of the birthing process, unless you want to lose an uncommon amount of blood. It can hurt, but it's very important. Nurses and midwives don't push on your belly to hurt you, they push on your belly to control postpartum bleeding.
Ok. I guess on top of having extremely different views of birth and the ncb community, we are also speaking different languages.