I was with you until you got to the part about feminizing males. It is not feminine to be able to express vulnerable emotions, it is human. The fact that our culture, including many women, punishes and censures men for doing that is the fault of a patriarchal society because as I already pointed out, it leads to a lot of negative mental health outcomes for males. Clearly it's not inherently male to be stoic or so self-reliant that you don't seek help when you do actually need it - it's toxic, or it wouldn't come at such a high cost.

I have no issue with men (or anyone) being strong and able to defend themselves and others. The issue comes when there is no culture of restraint and the use of violence to solve problems is the go-to rather than the last resort expectation.

From an evolutionary perspective, in order for a trait to be adaptive, it has to be beneficial to the well-being and the continuation of the species. Man Box style masculinity is actually quite destructive to men (and to society as a whole) so ergo, it is not adaptive/natural. Dismantling that as a social expectation doesn't harm men, it helps them. Characterizing become a more whole human being as being feminine is a big part of the problem.