And really, he has no idea what's going to happen to those slides, who else will see them, or what misconstrued message may come across in the absence of the talk itself.
Tough. Then maybe he shouldn't give talks. Who knows how they may be misinterpreted, even while he gives the talk!
Communication is an uncertain art. You never know what people are going to do with what you tell them, even if they do get it clearly. If you don't want to take that risk, just don't give talks. If you want to play this game, though, maintaining an illusion that you have some kind of control over the ideas you're presenting once they've left your mind and turned into some kind of transmissible form (be it talking, slides, or interpretive dance) is downright false.
Yes, it is always possible to be misinterpreted. But a presentation is an organic whole designed to minimize such misinterpretation - and usually designed to do so through careful coordination of slides and audio. I see no reason to feel required to make a partial presentation available when that subset might encourage misunderstanding.
Consider: would Apple ever release a Jobs Keynote with slides-only. Not likely. The alternative they provide is to make the entire presentation (or select portions) available as complete AV presentations (QT or whatever).
