Like what's to see anyway! 99% of flying is lookin' out the side windows, if at all. Shoot, most of it's lookin' down down at yer danged lap at a chart and navigatin' and the only time you really use the winsheild is taxi-ing, takin' off and linin' up yer landings. Now the commercial jets is different since the plane flies itself purdy much, lands itself and the pilot has to do is tap the brakes at the end of the flight and look real smart walking thru the airport..
Awww, jus' funnin... Kind of...
So really, wipers are purdy useless other than fir taxi-in'. I mean like what you gonna run into?