I don;t trust the ski pole on my Sportster b/c I require all the power and more this boat can produce, to get up on a slalom ski. Therefore, I only pull the pole up high enough to clear.
The issue with a tube is sometimes they can stick to the water and even submerge, putting a sudden heavy load on a pole. also most towers warm against pulling tubes.
I don't understand what the "handles" feature is, I do use a float on my rope just ahead of the handles to keep the rope in sight but that might spray water on a tuber depending on where the float is. I think I've used that same rope for tubes and not had any problems.
Then there are those large round balls the rope runs through just ahead of the tube maybe 10 feet, those keep the rope higher out of the water so the tubers aren't sprayed. I don't see many of them being used.