No, that's not what I'm saying. I think it's conceivable that with a great deal of effort you could build an open source system that is highly trustworthy. What

No, that's not what I'm saying. I think it's conceivable that with a great deal of effort you could build an open source system that is highly trustworthy. What I'm saying is that the gradient between "highly trustworthy" and "untrustworthy" is extremely steep. To use another analogy, someone using a firewall to keep a MacBook from phoning home is like a person who invests in a really high-quality lock on their jewelry box to keep their housecleaner from stealing from them.