Re: Abandoned and damaged starships
The M5 admitted that it killed all life aboard the Excalibur.
That's at least some evidence
that it did in fact do so. Even if the reliability of the machine to make that sort of determination is in doubt, that's still not "no evidence" as you claim.
“A life is like a garden. Perfect moments can be had, but not preserved, except in memory. LLAP” — Leonard Nimoy (1931-2015)