I’m flexitarian, that means that I prefer to eat vegetarian, but I don’t commit to it. I think there’s a good case to be made that eating meat is bad for the environment and animal welfare, but I don’t translate that into a behavioral rule, more of a guiding principle. Also I don’t really like meat that much.
I don’t really know enough about vegetarianism to argue about it, but my personal experience gives me familiarity with some of the pain points in vegetarianism–situations that make it particularly difficult to eat vegetarian. I imagine that committed vegetarians need to make major changes in their lives to get around these issues. But for someone like me with a very low level of commitment, it’s easier to just eat meat.