You're half right. Joe loves his shiny tech, but they're just toys to him. He whines and whines to get them, but when he actually has them, he gets bored and won't bother making movies with them. I actually wonder if the "sabatoging" of his films that his family supposedly committed was, in fact, just their refusal to spend a few grand on stuff Joe won't ever use.
Fact is, if you really want to write something, you'll write it no matter what tools you have at your disposal. If you want to make a movie, you'll make it with any camera you can. Joe gets worked up about upscaling and resolution and bitrates in order to compensate for the fact that he doesn't have the will to actually make a movie, as evidenced by the fact that his last film is now a decade old. I would also argue that even though he talks about upscaling a lot, he has some fundamental misunderstandings of what it actually entails and what it actually accomplishes.
But that's so Cracker.