They're the authority for anything that launches from the US and that transmits on RF. If Starlink interferes with US science the FCC definitely takes that into consideration.
"But it's not much" you'll say. Yeah, wait another 10-20 years, with all the additional shit launched into space.
And wind turbines’ neighbours find them unsightly and the new Virgin Hotel on 29th Street blocks some of my sunlight. This isn’t a novel problem.