That's terrible advice.

There are plenty of ways to respectfully offer alternatives to a clients "professional design idea".

Those of you that think a client is always right and shouldn't be corrected are lacking professionalism. Any professional in any professional environment, should and must educate clients on their expertise.

If a client has a bad taste for color, design, and layout, then offer them and educated or professional suggestion. Lets say you know nothing about building rockets, would you take advice from someone that has done it before, or perhaps builds them for a living? Understand that your client has hired you to provide a professional service. If you are not willing to educate and respectfully disagree with some aspects of their lack in design skills then you should't be designing.

Only after trying to educate and offer experience related alternatives should you lay down and do it exactly as your client wants it. This may sound terrible, but how many of your clients that want graphic or web design are professional designers or developers? None of mine are.