Emphatic gestures are one thing and descriptive gestures are another. But gesturing for the sake of gesturing is the irritating part.

You see it a lot on YouTube videos where people are talking to the camera and they're waving their hands around all over the place and pointing for no discernible reason. It doesn't change the information they're presenting, nor does it add to it. In fact, it just distracts you with someone waving their hands around.

So the same applies to presentations from a company. If you watched two people talking in a park, you wouldn't see this many gestures.

Hand movements are fine, but the comment is right that these come off as incredibly fake.