Light pollution isn't the right term. The issue with Starlink, and all satellites, is that they reflect sunlight and for visual astronomers and the pros working in the visible spectrum, those streaks of light cause issues with obsevations. Yes, software can deal with some of it, maybe, and astronomers can anticipate some satellite passes, but it's the volume of new satellites that are problematic.

The concern, and I don't know how valid this concern is, with all of these satellite internet companies is they are broadcasting back to earth and that could interfere with radio astronomy due to leakage out of band and harmonics.