And really, if you're talking about original intent and original scripts, why aren't you wondering why Lando isn't a clone trooper like he was 'meant to be'? Why isn't Kenobi the father of Luke? Why isn't Luke a general when the story begins? Why doesn't Han Solo have gills? Why doesn't Obi-Wan rise from the dead to fight Vader at the end? This is all stuff from the screenplays.
Now you're being silly. Lucas' ideas, from initial conception to the final screenplay to the actual filmed movie most certainly did change quite a bit. This is not odd, wrong, or strange, it's how stories often come together . . . in movies, tv shows, novels, comics, etc.
Lucas claims that when filming "A New Hope", after his ideas evolved into his shooting screenplay, that he intended the scene to portray Greedo shooting first. The scene certainly didn't end up this way. Why? Lucas worked with a lot of other writers, directors, and the multitudes of folks who are necessary to bring a movie to life . . . perhaps his intention got mislaid during the normal process of movie making. Or perhaps he DID change his mind later, and decided the scene would work better by changing it to Greedo shooting first, and then convinced himself that's what he always had wanted. It's certainly possible.
Without evidence to the contrary, I'm the sort of guy who takes the artist at his word. It's certainly possible Lucas is wrong or lying, but I don't see why I should assume that. Absolutely nothing in this thread has convinced me otherwise.
And, you know what? Lucas' original intentions for the scene is a red herring. If someone DID dig up a video from the 70s showing Lucas all ecstatic about having Han shoot first . . . . I could care less! It still doesn't justify the histrionics too many fans devolve into.
It boils down to this (for me): Lucas decided to change his original films by adding, deleting, and changing scenes, also by tinkering with the special effects. You might not care for some of the decisions he made (Han Shot First), really like others, and you might like or not like the overall end product of the "special editions" (and the later tinkerings). That's all fair. It's acting like Lucas has sinned against your childhood or the sanctity of film history that gets me annoyed.
Not that anyone should really care if they annoy me, just my perspective.