Otherwise we'd have had this dope...
More direct and to the point, if Bush lost we'd have had two looney leftists on the court vs Alito and the disappointing but not hard left Roberts. Bluntly, without Alito and Roberts then Heller would likely have been 6-3 against the 2nd Amendment being an individual right.
Yea Dubya is a disappointment on many levels. But the alternatives were worse. Way worse.
Bush didn't appoint any justices his first term. We couldn't know that in 2000, of course, but if we could have, maybe some of us wouldn't have voted for him.