That's exactly the point. But that's not only the case with George Lucas. The better the CGI, the worse the films, at least that's my impression. Nowadays everyone can do exactly what he or she wants. That wasn't the case 20 years ago. Compromise makes the better films, simply because less is more.
Case in point: Jaws
is a much better movie than it might have been because they couldn't get their mechanical shark to work right. Nowadays you just Sharknado
One reason why I like the Nolan Batman films so much. Nolan insisted on doing as much on set as possible. The suit is real, the Tumbler is real, the Batpod is real (except for that wheel twist), the Bat is real (mounted on moving cranes). They basically imposed limits on themselves. And it shows.
They could have gone Avengers, Spiderman or Man of Steel, with lots and lots of CGI action scenes, but they didn't. But the end result is more low key, and a lot more exciting. While over the top CGI action scenes are just numbing.
Also great are happy accidents. Most famous example:
Ford was too sick to film the originally planned fight scene, so they just shot the guy.