You're asking for "proof" of something which is speculation from a work of fiction? Really, brah? Really..?? Watching the movie it is clear that the Jedi are overmatched by sheer force of numbers and it is equally clear at the end that the remaining survivors were outnumbered, surrounded and being closed in upon. Had the gunship not arrived and had the droids continued firing, they all would have been killed. But, obviously, that would have made for a very boring Episode 3. I swear, it's hilarious how people in here act like it would just KILL them to admit that Qui-Gon in E1 as well as Grievous in E3 behaved unwisely for the sake of increasing the dramatic tension of a movie. I actually prefer it that way, I think it would have been stupid for the writer to have all those Naboo Security Guards open fire because that would have made for a very boring climax.