You are correct that most places allow renting of their condo. You do have leverage though as you can contact the property manager, rental agent or owner as to their renters behavior if need be. In the 13 years we have owned here we have not had any serious complaints as to renters.
A bad owner neighbor is a different problem as they can cause problems for everyone. We fortunatelyy have great neighbors and all are thoughtful . But we are a small complex 14 units.
Any new buyer needs to do a lot of research so they don't regret their decision. That's the case anywhere you buy.