How do people who work for robocall companies (unrequested phone marketing) live with themselves?

9:16 am Wednesday – already two robocalls / unsolicited sales calls. In both cases a human at the other end (who I hung up on).

How do these people live with themselves? Their success rate must be terribly low – like 1/10 of 1 percent. People hang up on them almost all of the time. And people curse at them and jerk them around.

They must know that their calls are unwelcome.

So are these people devoid of conscience? Why do they feel they can barge into anyone’s private life? Do these people have no feelings? How do they handle constant rejection?