the objectives of time management
Why bother with managing your time?
The answer is that you will enjoy your life more if you are able to achieve more, or to achieve the same amount but more easily, having more time for quality of life and enjoyment.
So the objective is to maximise the amount you achieve and enjoy. The meaning of life!
These are about the future and the present respectively. All of one and none of the other will not be satisfying you need a mixture of both. The past is not in the equation although it has made you what you are, and you can learn from it, you can’t change it.