Yes it's safe to eat dehydrated meat.
Meat is most nutritious when it's fresh and not dehydrated but it's still okay and healthy to eat dehydrated meat such as beef jerky in moderation.
If all you had to survive on was dehydrated meat or beef jerky then you could survive on it alone.
However if you have other foods you still need to eat other foods to stay healthy.
As long as you're eating fruits, vegetables and other healthy foods the dehydrated meat will not cause you any harm when eaten in moderation.
Dehydrated meat is no more harmful to your health than non dehydrated meat.
Our bodies do need some meats to get enough protein and stay healthy.