"These hypotheses aren't mutually exclusive. It's entirely possible that many of them are true and that over time, sleep has come to provide many functions. But why we sleep is a crucial question — figuring it out might someday help us understand why it's so important to get enough"
These are probably all true - once organisms started sleeping, it probably became useful for a lot of things.
And I wish we respected it more instead of resenting it. If there was no sleep, the brain would never been able to evolve to this level of complexity and we wouldn't be able to live through a lot of illnesses or bodily damage.
If you think about it, sleep is this incredible safety net that lets our bodies take risks: it's okay if this intense cognitive process might alter brain metabolism, or when working memory requires too many synapses to form, or if a common physical behavior can strain the muscles: sleep will reset and repair, and sleep will ALWAYS reset and repair, and it will do it before any damage can become long-term.
Sleep lets us explore so much more of our potential.
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