Clearly not...
No, meat is not necessary for a healthy life. The many healthy vegans in society are a simple enough proof against that statement.
More to the essential point, and it is a common one, that there is an 'optimal' amount of meat, which is less than what 'most people' currently eat, but is non-zero.
The recent long-running harvard study showed that this is not the case. This study provided clear evidence that regular consumption of red meat, especially processed meat, contributes substantially to premature death. The ideal amount of meat to eat for health reasons is zero.