Don't ignore me! :P
The reason behind this is that when you optimise a frame, you will probably send it to a projector as it is. If not, say you optimise the 3D frame and then do a 3D rotation, it will look like shit. Angle dwell points might end up in a straight segment resulting in a hot spot, and less pronounced angles in the default view might become much sharper after rotation, resulting in a badly drawn curve. Two points that are right next to each other in the default view might end up at the opposite end of the screen, without interpolated points between them, which is very dangerous for the scanners. Conversely two points at opposite ends will get many interpolation points between them and if they end up at the same position you get again a hot beam, which is very dangerous for the eyes.
And make sure you don't export as format 1 as that is 2D.