The body wears out. If one does not take care of it, it wears out sooner. One's DNA is the foundation. One's environment, nourishment, maintenance - and ability to relieve stress and relax, is the basis of bodily health.
Sleep is an individual thing, and different people need differing amounts. If you are dreaming, even if you do not remember the dreams, you are getting enough.
Personally, I am of the opinion that introverted people need more sleep. Extroverts do not want to internally contemplate or introspect on anything, and will go to extraordinary lengths to avoid it. Nothing wrong with that, just differing personality types. And that is just my opinion. We need both types, internally and externally directed people.
Also, people with bipolar disorder have manic periods of no sleep. This is a serious brain disorder. Sometimes I wonder if lrh wasn't bipolar. And a sociopath. Bad combination. Very bad. And he forced all his shit on his followers - or else.
Yes, all cults deprive followers of sleep. It breaks down not only the body, but short cirucits the brain, and logical clear thinking - and judgement - and weakens the 'will' of the individual, opens a person to influence and manipulation, control.
Sleep deprived people are vulnerable.
Tubbard did not want anyone 'dreaming', asleep or awake. Dreamers are creative, and rebelious, and follow their own tune . . . He nipped it in the bud. Cult leaders do that.
Unfortunately all those sleep deprived, malnourished, un-maintenanced bodies wear out, with no sleep, bad food, extreme and unrelenting stress, no internal release through dreaming, asleep or awake, no medical or dental care, and so off-loading came into being.
Gees, just writing this stuff makes me want to . Sheesh. Such utter and blatant abuse of human beings.
BTW, I love dreaming, asleep or awake . I LOVE IT ! My dreams tell me so much . . . . And I listen. Just my 2 cents.