Automated charting is great if you want to analyze data quickly; grab an excel table and turn it into a chart with one click.
It is different in presentation design though. When you generate a chart in PowerPoint, the colors are off, there are ugly tick marks, the labels do not look right. In most cases, I create the chart almost entirely by hand. The only thing that PowerPoint does is generate the actual bars or columns, the rest is put on by me as text labels in the right place.
Usually a presentation only contains a few very important data charts, and they deserve the time to get them absolutely right.