It can be useful for circumstances where you want to minimize (or even eliminate) retraction. I've done some cool prints in vase/spiralize mode with large nozzle sizes -- with zero seams, zero retractions, and zero moves over printed surfaces, you can get some really awesome looking prints.
But anyway it was just an example of a scenario where the slicer might not have enough information to know how to not crash the print head.
But anyway it was just an example of a scenario where the slicer might not have enough information to know how to not crash the print head.