Thirteen men are proposed to make up the group of GOP senators who will craft the Senate health care bill. As so typical of a hierarchy, people on top think that they should be able to make decisions for everyone else involved, and believe they are qualified to do so.
Since they believe their opinions and experiences to be superior to everyone else's, Republicans placing themselves on top see no problem with that idea.
http://www.cnn.com/2017/05/05/politics/senate-republican-health-care-men/index.html