I am yelling this into the ether that is the internet. I don't care what industry you work in, the customer is not always right. They rarely are. If they were, they would do the job themselves.
I work as a graphic designer and I can't stand when non-designers try to tell me how to do my job. My manager embraces the “customer is always right” mantra and I die inside a little bit every time she says it.
I was working on a project where the client wants us to use lime green text on white background. I pointed out that would be hard to read for the vision impaired. My manager says, “but the customer is always right.”
The agency who came up with the branding did not show a single example of using lime green text on white background. It was always on a black background…but here I am, being strong armed into using it in a way I know for a fact no respectable design agency would do.
This is applicable to other industries. I'm not going to hire a plumber and then tell them I don't like the PVC pipe they are using and they should use cast iron because like the aesthetic! Or I wouldn't hire a car mechanic and then tell them that the tools they are using aren't made from the right materials, or some shit.
Thanks for indulging my rant…