Here's the thing with Confirmation buttons. As people have pointed out, they aren't very usefull if the person is already reading the initial button press, and simply not paying attention or refusing to read.
This isn't the case with the release button. People are accidentally hitting it because it happens to pop up where their mouse is when they die. In this case, a confirmation button is useful. Since no matter where the release button is put, more than one person will eventually accidentally click on it as they die. The confirmation button efficiently fixes that problem.
This is the same issue with restoring your Defaults in the Options menu. More than once I've acidentally hit that button with an errant click. A confrim box there would be very nice as well. Not to help the people that click on purpose, but don't read what button they are clicking, but to help the people that didn't even mean to click in the first place.