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Why does this matter? It remains fresh when its evaporated until it falls into the ocean, and then gets evaporated from there back into fresh.

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Because it rarely goes back to the place it has been taken from.

That doesn't matter though, what matters is that sources of freshwater (rain over land) stays roughly the same. We can't assume that changes just because we evaporate water in a data center

It matters because there's almost none as it is, and you don't collect 100% of the water you use just because it rains. Water gets polluted, trapped underground, locked up in glaciers.

> It matters because there's almost none as it is

That's ridiculous and untrue.

Statistically speaking, compared to non-fresh water and compared to how much we actually use as a species, there is very, very little fresh water available to us.

I do need an entire ocean of water to live a normal lifestyle. Only some amount far less than the many, many, many quadrillions of gallons of freshwater we have.

If you live in the desert, stop doing that... or get them to laws for your specific place in the world. Where I live we have something close to an infinite supply of fresh water.

This attitude is why the world is fucked.

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