Choosing a property manager-- should they be an investor themself?

[Brett Russell]

I've been meeting with some different property managers recently to (a) get an idea of what areas they see as good investments and (b) figure out who I would want to use to manage my acquisitions.

I was very surprised to hear from one that he doesn't have any rental properties of his own. Should this be a red flag? On the one hand, I would want someone who has experience knowing how to increase NOI on a property and see potential (maybe just working with other investors would give this ability?). On the other hand, if someone is having success with investing, why would they be splitting their time to manage other people's properties and, worse, would I have to worry they would try to steal deals that I asked them to look at before purchase?