More elaboration is necessary on what is this "man's world".
One perception may be that a "man's world" is where women are discriminated
Well, this is true, to some extent, in the less developed countries. The law for men and women is not the same. Law is often not executed properly.
In northern Africa, it is common for girls and women in villages to face sexual torture, meant to make them less attractive so that men are not attracted to them.
This is definitely something ridiculous as in a "man's world".
Another perception may be that a "man's world" is one where the men works hours in office, and woman sits in home managing the kids and doing household stuffs.
Even here, people will take this in a different way. Some people will think that this is discrimination, that woman are often forced to look after household stuffs and has no independence. Others will think that this is alright, as women and men has different roles to play in the society and a child needs mother's care. As for me, I think the benefits of woman working in the society is far more than being trapped and looking for a child.
In my opinion, yes, this is a "man's world", almost in every way. But women are gaining emancipation in the west, and also in the east. But sadly, middle eastern countries still discriminate women substantially. But the situation should change.
After all, the male:female ratio is getting lesser and lesser day by day.