There's a biological basis for men being less risk-averse than women. If you think about cavemen days, as a woman, if you are pregnant, or could be pregnant, going hunting, making physical threats, or taking unnecessary risks will reduce your chances of reproductive success. It's better to be safe and conservative, because the life of your children could be at stake.
As a male, in primitive times, it was the opposite. Obviously it wouldn't be to your advantage to just pick fights with everyone, but there is much more of a competitive dynamic. The men who go out, hunt, and bring the food, will have more success within their tribes. In order to succeed as a caveman, you had to leave the camp in a hunting party and risk getting killed.
AFAIK, based on studies on mitochondrial DNA, we have 2-3x female ancestors as males. Meaning most males died childless. This is obviously not a model for how we want modern society to be, but I think it's healthy to understand where we come form, and why males may have more of a tendency for violence, or to get themselves killed in motorcycle accidents. It's not just because of socialization. There is a biological basis.
And I don't intend to. The topic is big enough for a degree and specialization in endocrinology.
I recommend to read the books from https://en.wikipedia.org/wiki/Robert_Sapolsky or at the very least watch all his lectures on youtube.
> I don't believe in toxic masculinity. Masculine and feminine traits have
You are confusing "toxic masculinity" with "masculinity is toxic"
"toxic work culture" does not mean "work is toxic"
There is plenty of scientific research on the topic. "Testosterone == violence" is plain wrong. In some papers, partial correlation was indicated.
The belief that testosterone is some sort of "manly warrior hormone" is an example of cultural bias that has been researched as well (see google scholar) and fits very well the description of "toxic masculinity".