Good thing LEO is becoming more profitable than GEO
Take a look at how quickly things in low Earth orbit burn up. If a Starlink satellite fails when it first reaches orbit it will burn up within days. If one fails after reaching its working orbit it will burn up after about 10 years. If the satellite does not fail, the last of its propellant will be used bringing down low enough to burn up promptly.
Geostationary satellites do not come down. At end of life they go up and will be with us for millions of years.