"Would that be a reasonable assumption?"
No. Hubble orbits around 540km. Starlink's outer 'shell' (I understand it has satellites at several levels) is in the 500km region, which could be a problem for Hubble. Some of the other constellations will orbit much higher and could cause much more significant problems.
And that's just for Hubble. Most astronomy is conducted not by professionals with multi-billion dollar ground and space telescopes, but by skilled and dedicated amateurs around the world. Who's going to compensate them for the loss of their dark skies or provide them with software to compensate for the satellites in their images?
Biting the hand that feeds IT
