Is a writer allowed to violate best-writing practices because of the clients' instructions? For example, If the client insists on the number of keywords you should use. Or gives instructions far from the standard way of doing things.
This is far from a controversy, but of course, if you choose to work with a client you will need to follow their project instructions. You can always give your opinion, but at the end of the day, it's their project and you are being hired to do it their way, not your way.