I believe what the OP is getting at is the masculinity discussion on the left is predominantly about what not to do while the discussion on the right is more often about what to do. If the left doesn’t provide a framework and examples of what positive masculinity looks like it presents a risk of young impressionable people draping themselves over the framework that is being provided by others.
My dad would tell other men "don't be a pussy," an attitude that is far from dead on the right. I've read a lot of advice from left, "men, seek therapy." I'm not sure that either side has a monopoly on positive/negative framing.
I'm confident that attitude is directionally agnostic. Most of the guys I'm surrounded by lean heavily left and still use "don't be a pussy" regularly.
Well, I was trying to avoid pointing out the wide gulf between "the left" and "feminism" which are being equated here, but your anecdote does a great job of that.