This is a fallacy. If you take a look at the kind of presentations you see at top-tier computer graphics
conference (i.e. SIGGRAPH -- shameless plug [paywalled]
and another one
), you will see that using all the fancy features of today's presentation software really can help in delivering the content of the presentation in a nice and intuitive way. The problem is that most people aren't willing spend one week on a presentation (except for top-tier computer graphics conferences).