Space needs maritime salvage law. If China could salvage it, then the US would have a reason to service it. Science was never enough; its always been about geopolitics.

Honestly, I haven't followed the progress of space telescopes in recent years so I'm not sure how much value Hubble still provides. (I'm guessing it's still a lot though.) As someone who grew up loving Hubble, I would be very sad to see it de-orbit. It would be quite the loss of a piece of my childhood.