Sentence 1 speaks only about the "women in tech" movement. The fact that "women in tech" self selects a mostly women population does not mean that commenting on it is commenting on women.
Sentence 2 is again speaking specifically about "women in tech" event, not about talking about the subject.
Sentence 3, is admittedly a defeatist attitude. However if there is nothing we can do about it, then why should we waste our time talking about it. In this case it is more of, if the people who are heavilly invested in this have not come up with something we can do about it yet, why should I waste my time unless I want to be a major activist. And, based on point 1, the movement is already hostile to what I have to say, so forget about it.
Admitadly, I am probably projecting my own thoughts on sentence 3.
Your projections are completely accurate. The only thing I would add is that my own fiancee is a woman in tech (she's a frontend developer), so it isn't like I'm hostile to women in tech or anything.
Sentence 2 is again speaking specifically about "women in tech" event, not about talking about the subject.
Sentence 3, is admittedly a defeatist attitude. However if there is nothing we can do about it, then why should we waste our time talking about it. In this case it is more of, if the people who are heavilly invested in this have not come up with something we can do about it yet, why should I waste my time unless I want to be a major activist. And, based on point 1, the movement is already hostile to what I have to say, so forget about it.
Admitadly, I am probably projecting my own thoughts on sentence 3.