I was thinking given what I'd read so far from you, you'd understand that your graph is not in any way representative of the concept of "equal pay for equal work". The graph you linked does not represent equal work. You'd have to be exceedingly stupid, or willfully ignorant to not understand that to start talking about equal pay for equal work, you need to look at like-for-like statistics within individual career paths. Ignoring that many women go into the humanities and teaching, and many men go into STEM or dangerous jobs, and then further ignoring the concept that those jobs pay vastly differing amounts is just mind-blowing. You cannot throw entire genders average salaries at each other and hope to come out with a meaningful number.
Personally, I was hoping you'd remain logically consistent and suggest a flat 10% tax on male citizens with that being paid out to the female workforce. Or perhaps you'd solve it by creating a law that all hourly and salary rates are identical for all jobs regardless of work type. At least at that point all I could say is that you understood what you were talking about, but have a radical outlook on the way jobs should be structured and the way people should be paid.
They are not tangential if you want to talk about equal work. They do account for as much as 75% of the "Gender Pay Gap" figure you're sticking to. You're throwing out a misleading number, and the amount of that 20% that can be attributed to actual real sexism and favoritism is about 3-7%. I am center-left, but I get mildly annoyed when people start throwing figures around that are disingenuous.