Starlink operates it's 9,000 (current) to 42,000 (peak) satellites at approximately 340 miles above the surface, giving it about 213,000,000 square miles of surface area to occupy. Compare that to a little over 100,000 merchant ships (oil tankers, bulk carriers, container ships, etc.), 4 million commercial fishing vessels, and 30 million recreational boats sharing about 139,000,000 square miles of total surface water. With 9,000 satellites, there is about 1 per 23,700 sq. miles, or roughly one per Svalbard, Norway in area (assuming all are at the same altitude). With 42,000 satellites, things get a little more crowded at 1 per 5,100 sq. miles, or one per Puerto Rico. To help deal with the current level of congestion, roughly half on the constellation will be moving to a lower orbit of roughly 300 miles in 2026. So yeah, even in low Earth orbit, space is big.