Not sure if it's what was meant, but an HOA board isn't too far off of that description. In my experience, the job is necessary but relatively thankless and uncompensated. No one wanted to volunteer their time, and I was interested in cash flow and a building improvement so I served for a year. The only other board members ran uncontested and also had very demanding jobs outside of the association. Everyone else was happy to let us take care of all the minutiae of coordinating maintenance, budget, property management, etc. It was a lot of work.

So to answer your question, I've observed that it attracts people who are already ambitious in other aspects of their life (and maybe a little too generous with their own time), and the extra work it entails compounds with their other commitments which can lead to burnout.