[djokkataja]

I agree that intuitively it seems to not make sense, but with regard to your specific points, and assuming that there's actually more than a nothingburger behind this whole story:

1. I wouldn't necessarily assume FTL. But even if we assume "arbitrarily technologically advanced," there's no reason to think that any technology will ever have an absolute 0% chance of failure.

2. It only has to be sufficiently peaceful to not wipe itself out.

3. I don't think AI doing things changes either of the previous two points.

What I find harder to believe is that humans would be able to get their hands on a crashed alien craft and keep it.

[TechBro8615]

It's also an assumption that the pilot of the craft is from the same species that manufactured it. Perhaps the technology was gifted to them by a superior civilization, or maybe they stole it, or maybe they're a genetically engineered descendant of an advanced species that died off millions of years ago without recalling its probes with their hibernating pilots.