JIRA is so customizable that it brings out the personality of a micro-manager, even in people who are usually not micro-managers. It's interesting to see how a tool used every day can shape thinking and behaviour patterns.
Your comment just illuminated that for me and I think you're right. It's the micromanager's dream, but for good managers it doesn't seem to offer enough over the competition to draw them in. The best I've worked with considered PM tools essentially fungible, and therefore weren't likely to invest in 1) paying for the Atlassian suite or 2) the overhead of getting it up and running.
After taking a class and reading up on project management and trying to get more organized about my own projects, it's basically that. People have been able to orchestrate large projects with nothing more than pencil and paper and then typewriter. The best PMs don't need to force a tool choice.