Because essentialism reduces your commitments to only the essential, it puts you in control of your day.
Many people allow others to take control of their day, e.g., colleagues requesting them to do this or that. When you know what is important to you, your day becomes your day. This involves having to say "no" more than you say yes. In time, others will also start to respect your time more. You will get to accomplish your priority in higher quality, which earns you more respect than trying to do everything.