I always say, “You have a responsibility to ask the question [about pay] because you have to set yourself up. If you're entitled to be paid more, why not?” In asking for what you're worth, you're actually making it easier for the women and people after you in the workforce.
One of my mentors told me that she doesn't negotiate just for herself, she negotiates for her partner, her grandkids, and the next generation of female academics. Women are excellent negotiators, especially when we're negotiating with others in mind. Put yourself in the mindset to have a courageous conversation that will benefit all.