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You're absolutely right. On the other hand, really extensive meditation can have some very strange effects on sleeping and some other things, so I personally withhold judgement.

If nothing else, take into account the studies that said that the placebo effect can actually help about 30% of people -- even if they know it's a placebo. So I don't know. Things get weird quickly.

> There is no possibility of this anyhow working.

I agree that this sort of rest is not equivalent to sleep. Nevertheless, this and similar techniques work well for reducing sleep anxiety. Less sleep anxiety tends to result in more and better quality sleep.

It may not alleviate the need for sleep altogether, but if you meditate a lot, like 10 hours a day, you can function well long-term with very little sleep.