And you don't spend from November of 1994 to April of 2005 and hundreds of millions of your own money, just to make a quick buck. You just don't do it. That's 11 years he could've done numerous amounts of projects(easier ones) to generate more money.
You may not like the Prequels but you can't say it wasn't a labor of love for Lucas. How can you explain why he changes the entire Star Wars saga from being about Luke to being about Anakin....openingly knowing that it would piss off the fanbase once all six were seen at once.
If anything, Lucas is stubborn...but not detached. But that stubborness has gotten him to where he is now. He's always been this way. He just has way more money and way more toys now. Plus, he's in his mid-sixties. The guy is set in his ways. Spielberg would even tell you that.