Honestly, I find it very funny and confusing that power point is being criticized for enabling people to do the very same thing I was always criticized for not being able to do in school - outlines.
Unless I got the whole thing wrong, the point of a powerpoint presentation is to outline or highlight the main points of something that was read, and it has to do with understanding main ideas and knowing how to summarize effectively.
it looks like what author really want to criticize is the bad use of power point. Using it in a way that hinders the message instead of delivering it. that might be what most people would criticize, but instead they they just say how evil power point is.
Again, I am not familiar with power point, but it seems to be a very rich program, filled with a number of different options, and misuse or overuse of those options can ruin the presentation. I think that might happen more often than not because people are just not used to the richness of it... and let's tell the truth people love to be extravagant, especially people that don't have access to the extravagance on a regular basis, and they often do it the first chance they have.
That's just human nature. Power point is not as evil as we are.