Well any fireman, policeman, soldier, people repairing communication towers, ice truckers etc. etc. risk their life on daily basis and they have families too, and they risk their lifes to support them, maybe calling them selfish is not fair.
Oh no I don't mean them at all. They are the furthest thing from selfish. I am talking about the Evil Kenevil's, Tight-Rope walkers with no nets. I skydive, but if I had kids and a wife I wouldn't be doing that or base jumping if it wasn't my profession.