Well said.
I firmly believe God never desired mentally healthy individuals to euthanize animals while feeling either satisfaction or indifference.
There are some twists and turns to this.
Traditionally, psychopaths were seen as people who were born with their brains wired to lack empathy; sociopaths being those with normal brains who were trained at a young age to lack empathy.
Psychopaths are, however, a large gray scale.
All people must have at least some ability to disregard empathy to function.
Those with too much empathy tend to imagine sensations in others that do not exist; also to anthropomorphize human feelings in lesser life forms and inanimate objects: such people can be dangerous.
The large, moderate range of the scale is normal. People can empathize to some degree for some length of time, and then have “empathy fatigue”, where they can no longer muster the energy to care.
Those with some degree of psychopathy tend to be liked because they are seen as more objective. Those who are strongly psychopathic without being antisocial are often seen as good leaders. They are also effective in jobs that require discomfort to get a better result, such as medical surgery.
Then finally is the extreme scale of psychopath, about 5% of all people. Even here, most are not criminal, having learned how other rationales to not harm others, and rules of behavior among others. But they are incapable of caring at all, and have no empathy to even extreme suffering in others.
Sociopaths have their own rules, and while they almost have to be trained at a young age, they can only be retrained to not be sociopaths when they are still young. If they reach maturity as sociopaths, they will likely remain sociopaths.