The truth of the trade

If the bomb needs an EOD guy, it's big enough that he doesn't need to be worried about getting injured

The only way a sane and rational human being can willingly face such danger is either when they believe they have good odds of coming out on top, or when they know that there is no choice. Someone will have to do it. The people who do jobs like EOD others can’t, or so others don’t have to do not generally have the luxury of pontificating on such things. They are people that understand and respect the danger they face, ones who do not generally don’t make it past selection let alone training, and if they do they aren't around long after. Understanding the complex electronics and mechanics of bombs, having the perception needed and ability to think as another human, a meticulous nature- these people aren’t idiots. Chances are if they think a bomb will surely kill them it will, and deep down they know what they are risking every time. So yeah- they could be maimed for life. That’s not the scenario you have running in your mind when you step up to defuse a bomb. Cool heads go home.