As easily? Fishing does not kill or maim 10% of everyone who tries it. Climbing mount Everest does. The man was a damn fool. I feel sorry that his children had a selfish egotistical idiot for a father. Now they don't have even that.
And if you think fathers can just as easily die taking their children fishing as climbing mount Everest, then you are TSFW.
Someone else will just raise his kids. I imagine his wife is pretty well-off.