The amount of potential debris is roughly proportional to the mass of the object (maybe more than linear, since smaller objects tend to disintegrate with no det

The amount of potential debris is roughly proportional to the mass of the object (maybe more than linear, since smaller objects tend to disintegrate with no detectable debris at all). A Starlink satellite is about 260 kg. The CZ-5B stage is about 23,000 kg. It’s almost 100x the mass, hence 100x the danger (or more, since satellite-sized objects rarely have any debris) and 100x the outrage.