Agreed, when speaking of the distant past, I always assume that by “man” they mean “mankind” aka human… Not males.
In the grand scheme, I don’t think it matters whether the thing was done by a male or female, the fact that it happened is the interesting thing about it.
I’m 100% positive that both men (males) and women contributed to these things, and it is impossible to know how much influence each sex had on any given thing, so I’m not sure why the sex of the ancient person who did it, matters.