I've heard the same thing from cryptography authorities in regard to rolling your own encryption and it makes sense to me. Having specialized knowledge opens your eyes to all the gotchas and gottahaves that most people wouldn't think about. While you certainly can take the time to set everything up exactly the way it should be and keep it updated, I'd rather spend my time doing/thinking about other stuff and am happy to pay the $120/year or whatever to let someone (vetted) else deal with it.