You didn't suggest that such a practice wasn't feasible; you suggested that anyone calling for humane practices was a hypocrite, which is not true. I will humor you, though.
I don't have a responsibility for ten thousand animals. I do have a responsibility to deal humanely with the animals that wander onto my property. I have done so. Extrapolate from that to the wider scene, and you would never have ten thousand stray cats. Irresponsible people/policies have generated this problem, not forlorn animals.
Exactly.