You forgot:
- Got Klingon married
- ~~won~~ survived a duel with a (very angry) Klingon
- Trounced said Klingon with scathing financial evidence, disgracing him publicly
- Saved his wife's house (whole estate with social standing intact)
- Secured wife's place on the council
- Got Klingon divorced
No idea if he got to keep those furs.
The dog is the only one that can't actually consent to space travel, and regardless, couldn't possibly know the risks. It is innocent, and doesn't deserve a violent fate.
Everyone else knows that they signed up to live in a metal box, with an artificial biosphere, which is all that separates them from the cold void of deep space. Also, said deep space is jam-packed full of things trying to actively break that metal box, if the crew doesn't beat them to it first. And nobody knows that better than Seven.