Interesting post, though what constitutes natural behaviour and what does not constitute natural behaviour is a difficult question to answer. For example, it is arguable that it is natural to try to cultivate traits which benefit society, and to try to remove traits which do not.
However, if not for policing to attempt to induce people who don't want to comply into compliance, how do you remove the troublesome traits? And if people don't want to change, inevitably, it would inflict mental health problems upon them if society attempts to make them change.
This would beg the question whether the natural behaviour which needs to be changed, is actually the way that we as a society try to bring about change i.e. it may be that what inflicts the heaviest mental health toll on people is not the traits we have or wish to embrace, but the natural response of attempting to get people to comply with modern day best practices.
So the "Manly" traits of old may not be natural, it is possible no societal constructed traits are natural simply because they are constantly changing over time based upon the present state of the society in which we are living, but the behaviour which first got get men to take them up, and that is now trying to get men to start rejecting them, may be natural. And perhaps it is that behaviour that needs to be addressed. i.e. the behaviour that first told men to be Manly, and that now tells them not to be. How to do that though without a form of policing is the age-old question. As is whether this type of behaviour is simply an inevitability of human evolution.
Interesting post, Elle, thanks for sharing! Makes you think!