This picture shows ALL of Earth's water (liquid, ice, freshwater, and salt water) as a sphere. It would be about 860 miles in diameter (about the distance from Salt Lake City, Utah to Topeka, Kansas, USA). Credit: Illustration by Jack Cook, Woods Hole Oceanographic Institution; USGS.
That’s a deceptive picture... we use land for living on by area, while water we use by volume. The only land we use is a very thin surface layer, much thinner than the oceans are deep, not all that rock and hot metal below that our mines can’t even reach. We’re not asbestos worms.
It would be more accurate to wad all of the surface we live on into a ball and compare it to fresh water... you’ll find a much more balanced look.
And why use a globe stripped of both fresh and salt water if the water they are referring to is only the fresh water? Just to make the fresh water look extra small by comparison, of course.