I think a mix of factors, the ones I think about are:

There is often no fallback. After a certain point there is no one to take care of you so if you fail your options quickly run thin. This leads to feeling increased pressure to do high risk activities.

I also think men value their lives less. There is a certain line of thought that is in every mans head where they are pissed off and they look at their life and they look at what they're pissed off at and they think "What if I just threw it all away to destroy that thing" at least I could say my life was useful. For most men this check fails because their lives are decent but for people on the bink I can see them thinking its worth to trade their life to take someone elses. If I were in the US i'd probably trade my life for Trump's if I thought i could do it.

Biology, higher propensity for taking extreme risks, tolerance for violence, physically stronger on average, mentally mature slower, wider distribution across the iq bellcurve. We grow up fighting each other for fun, we see and learn about millions of us dying in wars, we see how failures are treated in society, we see a lot of media showing 'failures' lashing out at society.