We cannot do without cholesterol because the body needs it up to a certain level in order to:
 Help the absorption and transportation of fatty acids.
 When skin is exposed to sunlight, cholesterol and other related substances turn into active Vitamin D.
 Cholesterol is the raw material for many hormones – Vitamin D, the male and the female hormones and hormones of the adrenal cortex.

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Since cholesterol is essential for all animal life, it is primarily synthesized from simpler substances within the body.*

I guess we don't have to take any conscious effort to intake cholesterol. where as high cholesterol is one of the major health concern in the world.

An alarming statistics

http://www.wrongdiagnosis.com/c/cholesterol/stats-country.htm

* Wikipedia

I never knew cholesterol had so much to do with everything that we do! That's pretty weird. Our bodies do so much for us on a daily basis and.. we really don't notice any of it!

Theres good cholesterol and bad cholesterol and its good ones that do all these work the bad cholesterol from saturated fat simply clogs up the arteries ...