My professional input does not depend on bias in moral (or similarly fuzzy) questions.

But that doesn't make philosophy uniquely broken. If anything it is the other way around: disciplines that deal with the kind of well-defined abstract problems where biases can't get a grip, are exceptional.

As for other biases, I definitively determine success or failure on a time scale ranging from minutes to weeks.These are rather different from how a philosopher can operate.

"Can operate" was carefully phrased. If the main role of philosophers is to answer urgent object level moral quandaries, then the OP would have pointed out a serious real world problem....but philosophers typically don't do that, they typically engage in long term meta level thought on a variety of topics,

Philosophers can operates in a way that approximates the OP scenario, for instance, when they sit on ethics committees. Of course, they sit alongside society's actual go-to experts on object level ethics, religious professionals, who are unlikely to be less biased.

Philosophers aren't the most biased or most impactive people in society....worry about the biases of politicians, doctors, and financiers.