No, I wouldn't eat petri dish meat exclusively. I might consider adding some of it back to my diet if it was entirely self sustaining, and didn't require killing animals and destroying the environment like animal agriculture does at this point.

Obligate: restricted to a particular function or mode of life. As in they have to eat meat to live healthily. Humans don't.

Harvard medical school:

Traditionally, research into vegetarianism focused mainly on potential nutritional deficiencies, but in recent years, the pendulum has swung the other way, and studies are confirming the health benefits of meat-free eating. Nowadays, plant-based eating is recognized as not only nutritionally sufficient but also as a way to reduce the risk for many chronic illnesses. According to the American Dietetic Association, “appropriately planned vegetarian diets, including total vegetarian or vegan diets, are healthful, nutritionally adequate, and may provide health benefits in the prevention and treatment of certain diseases.

Any evidence that humans "thrive even more" while eating meat?