The point of those beliefs is simple: that's what it takes to get results in this economic system. It's toxic fuel. Whether or not it makes sense is irrelevant
In this economic system, everyone is a free agent trying to maximize their own wealth, but at the same time we have a need for support. People can simultaneously be wolves and sheep
I'm not saying that people shouldn't confide in each other. I'm saying that in this fucked up world, you need both. One side comes naturally because we don't come out of the womb scheming, the other is a hard truth that we all have to make peace with. If you want to keep your stuff, you have to fight for it. Toxic masculinity isn't some pointless evolutionary quirk, it's solving a specific problem in the circle of life