Huh. Never realized it before but one of the reasons I like Starship Troopers is it doesn't really have any glaring examples of these kinds of plot idiocies.
None of the conflicts in that film could have been solved any better with reasonable, adult communication, for instance. The mistakes were all just kinda normal, understandable, human mistakes. Despite these people all clearly being half insane in a fascist sci fi world.
It really grounds the film in its plot, where it would otherwise be too over-the-top everywhere. Verhoeven was good...
That was pretty good. Though I do feel comfortable busting down the theory that she was able to alter its course enough to strike Earth. With the amount of momentum we're dealing with, taking a chunk out of a starship is pretty small potatoes. If altering the course of potential impactors were that simple, we wouldn't need to concern ourselves about it very much.
I have a couple other pieces of ammo too, but that's probably my strongest.