For me, the "logic" goes like this: my cat wants to go outside, so I let him outside. (He was neutered, so not going to make any more cats.)
He's an adult (cat) and can make his own decisions.
I won't let my (small) fear of his death imeped his (great) desire to go outside.
Update: he lived a long-for-a-cat happy life and passed peacefully several years ago.