> This is why it’s perfectly socially acceptable to set up a specific group to give women and girls a chance to learn skills in an environment where they feel safe from sneering, lewd comments, and other such behaviour which is not conducive to learning, or simply having a good time.

No. You just make it clear this is an environment where such behaviors are not tolerated.

Also, it's not true that women and girls are incapable of sneering and lewd comments.

You come across very much as the kind of person who believes boys are inherently deficient and deserve to fail, based on your assumptions about how boys will behave, and that they are incapable of behaving differently.