What I meant by that is time doesn’t care about your trying to manage it. You can’t tell it to slow down or speed up. The next 60 seconds will pass whether you want them to or not. Same with the next 24 hours.
Time management assumes that you can exert control over time which is impossible. You can only manage yourself and what you choose to prioritize in your life. Getting bogged down in scheduling and to-do lists takes away from the real goal which is to figure out what’s important in your life and dedicate yourself to it.