This kind of argument is often used to dismiss and shut down discussion of social ills by trivializing things that are actually important. "Oh, these spoiled entitled women thinking they should receive as much for sitting in an office as a man does for fixing high voltage lines! Don't they know women in Africa are literally having their vaginas sewn shut?"

Yes, thank you, we know. We also know that many of us (myself included until recently) make less than our male counterparts for performing the same duties at work, and that those dangerous high paying jobs like the one you reference rarely hire women, even when said women are qualified.

Are those issues as bad as FGM, or any of the other atrocities committed against women in the third world? Of course not, but what is? If that's the standard to meet before something becomes a problem that needs to be addressed, very few problems will ever be addressed. Very few things are as bad or worse.

Also, somewhat related: the majority of charity work being done in the third world to help women in those awful situations is done by women's groups. Feminists want to improve life for all women. Some focus their efforts here, some focus it abroad. Some do both! There's not a finite amount of giving a shit available. You can think both pay disparity and FGM are bad. You can fight to stop both.