Is entropy important?

A combustion engine is 50% efficient at converting its energy,
An electric motor (or generator) is 80% efficient in doing the same.
How efficient are we humans at converting our energy?
How much negative entropy do we need to consume in order not to have too high a gain in entropy?
Sunlight, water, food (and money) are all forms of negative entropy of necessity for humans to exist.
If we are deprived of any one of these, we will reach maximum entropy very quickly. Our individual entropy is finite.
Maximum human efficiency is attained when we use negative entropy, in an optimum way, without waste.
Indeed, over-exposure to negative entropy is just as bad for us, and will affect our efficiency rate, and thereby our optimum running condition.
If we are able to control our negative entropy efficiently, we will be able to run at our peak potential.
The same holds true for anything we do; for all we do, is expend energy.
Therefore, we should conserve energy, for it saves our precious entropy.
In this way, we can have far more opportunities to do, or expend energy on, the things we really want to. This is what we should do, while we slowly but surely, navigate the path of life until we reach maximum entropy. This is the realm of fulfillment and happiness we should strive for before we expire.
This is how the second law of thermodynamics affects all matter, and everything we humans, achieve.