What Mises said was that, quite simply, Man acts. Maybe not necessarily rationally, but definitely in order to improve his current situation. Action is preferable to inaction, since if it were not, Man would never act- yet he does. Man acts in his own self-interest, since that is his first real concern. He prefers leisure to work, however, and so will seek the course of action that is easiest in achieving his own ends. Nothing in this chain of logic is specific to r-selected societies versus K-selected societies. It's just that r-selected societies have come to prefer comfort to such a high degree over discomfort that they are incapable of recognising the massive discomfort that is to come from their own inaction, whereas K-selected societies, having generally lower time preferences, will recognise those signals and act accordingly.

Moreover,the basic ideas of Austrian economics applies across cultures and populations. This is why r-selected societies like Muslim societies stagnate- because those societies, for all of their sexual conservatism and extreme militarism, are totally state-controlled and provide no flexibility or freedom for individual entrepreneurship. This is also why K-selected societies tend to work and then fail over time- I'll elaborate on this a bit more once I've finished reading this book called A War Like No Other.

The Manosphere is ahead of the curve on this one. The -sphere advocates masculine virtues, and all it will have to do is manifest itself in the real world when the collapse eventually happens.