It's a bit weird to see people so against diamonds (something they don't want and don't need) and happily using dead Africans in their discussion, but when you start talking about gold or rare earth minerals that shiny gadget isn't bullshit, it's an important tool. (Never mind that a machine from 5 years ago is for almost everybody just as capable.)
The real reason isn't the blood diamond aspect. It is the male equivalent of "get in the kitchen and bake me a pie", except social expectation is for men to do the things that are expected of them, regardless of the inherit fairness or rationality.