I think his comment was about losing trust in the relationship with his vendor, so the backup status of his computer is of course irrelevant. For example, if one of my vendors irrevocably lost my data and suggested it were my fault for not backing up, I would mirthlessly laugh at them (at the least).

Reminds me of a philosophical error I see folks make a lot. If a girl assures you she's taking birth control but is secretly not, you may wind up impregnating her. Perhaps you'll then complain to your grandmother about how cross you are with your girlfriend. If your grandmother responds, "Oh, that makes me so mad. It takes two to tango, you know!", she is quite wrong. In the scheme of all actors, you certainly bear a share of the responsibility for the situation you find yourself in, but just between you and your girlfriend, she's 100% wrong, and deserves every ounce of irritation.