Here’s the deal, dealers don’t change the wipers prior to sale , they don’t change the batteries most of the time too. I’ve bought several vehicles from a variety of dealers and all of them had crap/shot wipers. I learned this when my wife got her Rogue, for two weeks afterwards we had just stunning weather blue skies no snow. On the way back from thanksgiving in an absolute blizzard we discovered that the wipers that were on the car would have been outperformed by a dog turd covered in molybdenum disulfide grease rubbing on the windshield.
Whenever I buy a vehicle I swap blades and every fluid I can think of regardless of the dealer’s ******** 158,000,000,000 point inspection. General thought process that has never failed me is to go in with the understanding that car dealers are absolute scum bags and will do anything to squeeze out any bit of margin possible.