The location is not super ideal. My only thought is that the tesla service station and showroom nearby had requested a nearby supercharger. The highest number of Teslas I see in the valley are in Palm Springs (which has a supercharger downtown) and in Indian Wells/Palm Desert. To get to those areas, you don't normally take Date Palm Drive. If the supercharger was located closer to I-10, it would alleviate congestion at Indio, but it is halfway between I-10 and 111 according to the map.