Your a NarutoSakura fan ????
Why do I think that ? I quote :
It's goes against the principe of chakra/ninjutsu .
A reviving jutsu like Oldie Chiyo did require a humorous chakra power that could only be getted when Oldie Chiyo put all her lifeforce into it plus naruto helping.
Chiyo who was known as a legendary ninja would die from only reviving 1 person.
Sakura would never get enough chakra to do it, even with the cliche love power boost.
And you probably thinking about using Edo tensei theory against me ?
Edo Tensei is not a life reviving jutsu it's a body reviving jutsu, they can only talk cause they're soul is binded to the body, a body without a soul is just like a zombie. Edo tensei revives the body and soul. But the human does not really live anymore, he becomes a puppet and when the user gets beaten or stops the Edo Tensei jutsu. The bodies die.
Also the jutsu Lady Chiyo did was a Forbidden Jutsu.Edo tensei is the same. Using a forbidden Jutsu can get you banned from a village (It's not for nothing forbidden).
Is this considered a rant ?