Just bcoz the SP is not on the other aisle doesn't mean the pax on that aisle are deprived of good service!!
SPs r given the ling skirts bcoz they're positioned at Door 2 left! That door is always (almost always) open for boarding n disembarkation. A lot of ports may/may not use door 1. So being the one welcoming pax on all flights she's given that long skirt for that lasting elegant first impression!!!