I think you state your case too forcefully.
For instance, if I walk into my living room, and my neighbor is eating my German Shepeherd, I am putting him down, no questions asked.
And in my own intimate reflection of self, I do not consider myself a sociopath.
There are plenty of shades of grey between hesitant Samaritan and textbook sociopath.
The two Latino fathers are doing a great job of showing the viewer multiple ways to make difficult choices. I find myself agreeing with both of them.
EDIT: (preEDIT! I edited before I posted)
I DO agree using your example, that killing the babysitter with no effort leans towards sociopathy.
Do you agree that catching the dog eating neighbor and resolving the situation more forcefully does NOT lean towards sociopathy?