True enough. He had enough reason to leave it out in the first place.
It is serendipidous that we are discussing Episode IV because I saw it this weekend on TV. Dish Network offered a free weekend for some of the movie channels and one of them aired Episode IV (the “upgraded” version). I enjoyed it even though the new effects bugged me from time to time.
If Lucas wanted to restore the prints to remove scratches or restore the colour, then I would receive that effort warmly. It is the futzing with the scenes and effects that does not settle well with me. When I have kids, I want them to see the films the way they were when I saw them for the first time.