With Star Wars in particular, Lucas' incessant meddling has long have gone far past the point of diminishing returns, and frequently making the movies worse.

More in general, I like watching the original movie, warts and all. I often disagree with the corrections, especially when they restore scenes that were left out for a reason, make color correction choices I disagree with (e.g. Blade Runner's "green tint" is inferior to its original bluish tint), etc.

How many times has Lord of the Rings been revised? Dune? <Insert other long-lived actively managed novel>. Is the active management of these novels "wrong"? Is fixing grammar, spelling, or clarifying story beats "wrong"?

I personally don't think so, and I'd rather read something which has been corrected, especially if done for story clarity.

I was told about the pole that causes the truck to flip in Raiders of the Lost Ark and now I can't unsee it.

—Warning to those who enjoy 2001 A Space Odyssey with their blinders on...—

2001 made a big impression on me as a kid and I've seen it many times. There was a point when watching for the Nth time in middle age that I first noticed that all the anti-gravity shots show the actors bodies carrying their own weight. Especially in the aisle scene with the floating pen, which itself is rotating about the center of the sheet of clear plastic it's attached to rather than its center of mass. Later in the same sequence, food trays are brought to the bridge after the long scenes of a flight attendant, who picks up trays as they slide downs from a dispenser, and as she hands the trays to the crew, one of them instinctively puts his hand out under the tray to helpfully catch its weight. In the next scene an officer joins other crew by coming up from behind them, leaning over and resting his arms on their chair backs as the scene cuts to details of anti-gravity meal consumption. Finally Floyd stands in front of a toilet reading a 1000 word hard-printed list of instructions after the viewer has been shown electronic displays used everywhere else. The self-consciousness of that clip provides a lovely relief from all the previous cognitive dissonance. I'm not able to unsee any of this now and it detracts from the spectacle. But at the same time, it makes the orchestration and ideas of the movie seem all the more artistic, so nothing lost except innocence. There are many other oddities to find in the movie working on different planes of awareness, including proprioceptive assumptions about reality, intelligence, progress, and spirituality.

It's really not the equivalent though. I don't see anything wrong with fixing a license plate or removing a reflection or a modern-day wristwatch.

It's the equivalent of fixing a spelling error in a novel, or a wrong chord in sheet music. None of the filmmakers wanted those things there. They weren't done with intent. They were just mistakes.

Changing music or replacing a puppet with CG, of course I'm against. That's changing the art of it. Different music makes you feel different. A CG creature has a different personality. Just like you don't want to replace vocabulary in a novel to make it more modern-day.

I think it's usually pretty easy to distinguish the two. The first ones would have been corrected at the time if they'd noticed and gone for another take. They take us out of the movie if we notice them. The latter category is a reflection of the technology, resources, and intentional choices. They keep us in the world of moviemaking as it was at that time.