Customers are wrong all the time... there are a ton of things they can't understand and changing everything for the whims of every customer is an exercise in madness.

I do think feedback can be an absolute gift (you'll never really know what things are like for your customers because you're always too close) but generally I think it's far more effective to try and explain things to customers - and then if they're unreasonable after that explanation then you actually don't want their business. It's almost always going to be more trouble than its worth.