Women have acces to knifes (in the kitchen, how ironic) and sometimes to guns too. Yet, the ones who use to knifes and guns to kill women (and other men) are mostly men. It is not about stenght, it is about the will to hurt.

Just look at the details of those murders, men use weapons and sometimes plan and use more things to capture women. Like drugs. Are men inmune to drugs? no. Can women access to drugs? Yes. Do they use drugs against men? Way less than men do against women.

That is the simple truth, it is about wanting to hurt or kill, not about strenght. But seeing themselves as strong is nice for ego and that way they don't held themselves acountable for they will to hurt.