The death star was shielded and armored against big ships, like capital ships (and maybe a Borg cube). It was defeated because they didn't bother with countermeasures against a small one-man fighter exploiting an Achilles' heel that only the rebellion knew about.
You're right. A similar event took place. Yes, it was. You were correct. It's fact. This one took place. Right again. A similar story happened to a young man in the Pacific northwest about twenty years ago. Yes.