Mathias Meyer, CEO of Travis CI:

There’s one fundamental mistake in both using and looking for culture fit as a means for hiring: You’re assuming that your current culture is healthy and doesn’t need to be changed.

Using culture fit as a reason to fire or not to hire says more about you than it says about them. It says that you’re not willing to dig deep and figure out what exactly you think doesn’t match in your expectation and a candidates personality. It shows that your culture is a fixed property of your company and team, one that can’t be changed, one that is exactly where you want it to be.

Culture fit is a reason to continue maintaining the status quo.