These examples imo are often sources of added fluff to process. The goal of the presentation is to get the point across. Unfortunately, I see too many people make these terrible powerpoints, where its clear they spent too much time making the template sexy and not enough time considering what content the content is. My favorite powerpoints are the ones where people use the default white background and text, and just put up a single figure per slide and describe them versus talking off bullet points with a bunch of junk imagery. If I am reading a sentence on your slide, I am incapable of listening what is coming out of your mouth at the same time. Basically, the slide deck should only take you as much time to make as pasting your figures over to it.