Your goal is not to make your client or boss happy

As a designer, your goal is to find the best possible solution to a user problem. You are giving voice to the users of the product, who otherwise would have little room at the table.

While having a positive working relationship with clients and teammates is good, it is your responsibility to flag anything that negatively affects the users even if that leads to some serious conversations. Some of the user needs may conflict with the needs or interests of your organization. While it is part of your work to consider the different constraints such as production costs when solving a problem, you also need to make the organization understand that going against the user interests won't be good for the organization in the long run.

For example, an airline website that hides the option to opt-out from travel insurance to trick users into getting it will get some monetary benefit in the short term, but it will negatively affect the trust the users have with the brand in the long run. Tricks that make products hard to use on purpose are known as dark patterns, and you should never use them.