This is a fascinating concept and I think it has huge implications. The problem though, seems to be women's inability to find attractive low t men, resulting in falling birthrates and male loneliness. Eg, women who want 'a high t man' despite that not being in the best interests of the man. She doesn't think about what is good for the man though, she goes with her desire (as, arguably, she should).

And not sure I agree with the claim that ability of men to adapt to a sedentary lifestyle results in their automatic success. Yes, they may not lust after woman in the same way, but they are still likely to feel a profound loneliness and ennui wothout a romantic partner, and their low t might result in their inability to mitigate this through even casual encounters.

So we're left with a majority of men who are quite well adapted to survive in such a society in some sense, but quite unable to find a partner. The question then becomes why they would continue to contribute to such a society. And I think the answer is that they will stop paying tax, in the hope that the state collapses, anarchy ensues, and we go back to traditional gender roles where a single man again fulfils the multiple roles that technology, the state and high t men provide to them separately at the moment.