These approaches teach us to make cold calls this way: introduce yourself, explain what you do, suggest a benefit to the potential client...and then close your eyes and pray that they won't reply with "Sorry, not interested" or "Sorry, I'm busy."
If you're still using this traditional approach, you probably hear responses like these the moment you stop talking.
They're rejections, and what they do us make you feel rejected -- and that's reason enough to make you dislike, fear, and avoid cold calling.