Time is the most important thing and asset in our lives, never waste time with useless things like sleeping too much, watching tv for too long and so on, people will realize and feel that time is very expensive when they are old and unproductive so many things missed.
In my opinion, proper sleep is very important for a person.
Therefore, you can not save on sleep. Such saved hours of time will not be productive. A sleepy person will not be able to focus on important things and will be inefficient.
In a dream, the brain processes all the information of the current day, relieving the subconscious of unnecessary emotions and information.
At the same time, the human body rests, and all biochemical processes in the body are brought to a stable state. Sleep is very beneficial for health.
Time management practices should not, in my opinion. lead to savings on sleep.
We can limit TV viewing or cut time for other habits but with sleep and time to relax, it's absolutely essential to us. I also worked without sleep and I finished the work earlier than expected but in the end the quality was not very good. When we lack sleep or stress too much, we will not be able to focus and be sharp to handle the work in the best way. I will not consider sleep a waste of time, getting enough sleep is very important for your health and work.