I 'get' that it is completely superfluous in most situations, but I still want it 
But it is for mostly aesthetic reasons. DH and others come in from the farm regularly throughout the day and wash hands at the sink. The soap dispenser is constantly filthy as they handle it with manky, dirty hands. They seem to be able to rinse the tap as they turn it off but the soap remains the bain of my life.
And because it is right by my kitchen sink, I can't help but feel that it is more than just aesthetic - farm germs are not nice!