Obviously both must be hard!
But a vet has to know everything about a whole bunch of species, from conditions to how totally different bodies work.
Plus they have to do surgery as well as general check ups.
Plus they have to euthanise.
And PLUS there's a fear/danger element with some animals I guess.
If we were I'm an apocalypse situation, don't you think a vet would be handier to have around than a doctor? Could a vet operate on/diagnose a human if push came to shove?