You're not. Go live amongst the trees and be a beautiful independent spirit and write a great American novel.
All this author is saying is that if you CHOOSE to make commitments and then fail to honor them, you're not an awful person, but yes you should feel guilty for that. On that, I agree.
When you accept a job, or a meeting invite, you are making an explicit committment to a work schedule or an appointment. That is a personal committment that you chose to make. If you sleep through it, you failed your committment and should feel like it.
For myself? Sure. But why should I feel beholden to other people's schedules like the article says?