Meat Benefits
Meat is a lot of consumable energy per ounce compared to most vegetables. The plus is that meat has all the proteins in one source. Meat can be preserved in many ways to make it last a long winter.
Those should be good pro-meat arguments that you want. I consider myself as an accidental vegetarian. I started by skipping red meat and eating chicken and turkey, then I limited meat as a side dish instead of the main course, then I ate meat occasionally and then realized that I had not eaten any meat in months. At the same time, I lost weight and gained energy.
I do not think that meat should be off of everyone's menu, but I think that people should be aware of how much misery they eat when they eat something that was raised in cramped conditions and treated badly until it was ready to be slaughtered. Humans are ominvores, we can eat nearly anything and thrive. There is no dietary requirement for meat with every meal, every day for a lifetime.