No, that's wrong. Our teeth are very similar to Old World monkeys and apes. And even the Platyrrhines (New World monkeys) have similar teeth diversity, but just different numbers.
However, incisors don't necessarily mean hunting, etc. Even the prosimians (e.g., lemurs) who came before monkeys had incisors...but they use them for eggs, hatchlings, digging into bark for insects, etc.
So? They are omnivores as well, you'd expect them to have similar kinds of teeth.
We also have molars similar to those found in cows. That doesn't mean we are descended from cows, nor were once grass and small grain seed eaters either.
Our teeth, and the way they are arranged proves, as does all recorded and discovered history of mankind prove that we were always omnivores, and meant to be this way.
Not one single tooth, gut part, intestine has 'evolved' from the original design.
Mankind is also designed to survive better than almost any animal as well. Unlike many animals, we can survive on a diet lacking certain things for generations.
Sure, eating a well balanced diet will help you live longer, but sometimes it’s not all available.
We can survive on meat alone for example. lacking any source of carbs, our livers will produce them from proteins in the body. Inuit are a good example of a people who’s diet is mainly meat.