IT folks need to stop being so serious. One can learn alternative perspectives in a variety of ways. If images distract you then you can choose to not look at them. In the blogosphere there is no audience only folks who can freely choose which channels of information they choose to listen to or ignore. I would say though that several bloggers have indicated that imagery is a good thing.
What he misses is that the images distract from his message, period. It doesn't matter how, or why. It's just the way it is. Accept that simple fact and move along, rather than trying to explain why the problem shouldn't be a problem.