Just being real writes:
How many other people saw the space ship? How well did all the witnesses hold up under strong interrogation? Did all there testimonies basically agree without seeming too much like collusion? What mental state are the witnesses in? These questions all play a very important part in analyzing subjective evidence.
Take for example the story of the resurrection of Jesus...
...
The only conclusion based on the "subjective evidence" is that the event occurred.
You are correct. And, if this accurately described reality, then your conclusion would be correct.
However, your analogy does not accurately describe the situation we're investigating. You seem to have forgotten all the different religions. Even all the different Christian religions.
We don't have a bunch of folks who see the same spaceship.
We have many folk who claim to see 1 kind of spaceship, and another many folk who claim to see a different spaceship, and another crew who say it wasn't a spaceship at all, but a time machine... for over 100,000 different "things." Plus, we have many folk who claim that no space-ship (or anything else) was ever present in the first place.
Taking actual reality into account while looking at the Jesus story:
-we have lots of witnesses that say Thor actually exists
-we have lots of witnesses that say Allah exists, not Jesus
-we have lots of witnesses that say Jesus does not exist, and never did
...and taking reality into account, we see that the only conclusion based on the "subjective evidence" is that we're right back where we began... with no evidence for anything happening at all.