That's a lot of salt, though: "if the salt in the ocean could be removed and spread evenly over the Earth’s land surface it would form a layer more than 500 feet thick."
If 3.5% of the water is salt and that would create 500 feet of salt if staked on land, then the remaining 96.5% would make 13785.7 feet of water assuming salt and water has the same density.
So it could be greater than you’ve estimated.
The presence of water bodies itself is what defines the current borders of "the land". If you take the water out, aren't you just creating more land surface?
Which you then have to cover with the water you're taking out. Until it all evens out.
Simple writing isn't easy. It doesn't just flow out. Garbage flows out. Well-chosen words in just the right order lie in the tenth rewrite, by the person who has studied writing for ten years.