When comparing extremely safe options, the benefits should guide the decision. The proper way to compare risk is by their absolute differences rather than relative differences. When choosing between two options have very low risks, their benefits should be considered. Members of the public would be very unlikely to knowingly buy a lottery ticket with these odds. To reach a high probability of killing someone, NASA would have to re-enter hypothetical CGROs everyday for 10,000 years.
All critical subsystems are redundant.
ASAP after any critical subsystem fails. The probability that the backup subsystem to a failed subsystem will fail during the few months required to effect a re-entry is very low. Before destroying a valuable and productive Great Observatory, this risk should be professionally evaluated. If an independent review concludes that some subsystems have excessive failure risks, scientists will accept the need for re-entry.