While your parent comment does have a ridiculous idea of how orbits fundamentally work, orbital mechanics in near earth do end up being that unstable, hence the

While your parent comment does have a ridiculous idea of how orbits fundamentally work, orbital mechanics in near earth do end up being that unstable, hence the orbital stationkeeping fuel budget all satellites in the region have. It's just the toll of a faint atmosphere, solar radiation, mountainous terrain. You'd have to go out to around the geostationary area for a "clean" orbit, and even that one's still going to be tugged around by the moon. On the plus side all those weird interactions with real life allow you to do fun things like change orbit with electronic tethers or orbit around nothing by exploiting Lagrange points