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.

2.5 to 3% according to google... Small but not tiny tiny

Three percent of two thirds of the entire planet is enormous. We aren't running out, and never will.

Some people just live in places that aren't suitable for human life and survive only through technology. Those places need to have different laws about water.

For example, I shouldn't be forced to use a low flow showerhead when I'm 100 miles from 1.3 quadrillion gallons of fresh water. If you aren't next door to lake Michigan then maybe you should be.

That's fresh water in general. Most of it is frozen. The amount you can actually use is a sliver.