In this case, "biases" are more than likely what a person would consider to create their personality: the things they gravitate toward, skewing their reactions and actions as well.
This can clarify that on the path to enabling as many objective thoughts as possible, one must be able to ignore the things that make up what is being considered "personality" at the time of thought.
In this sense, a person who acts (successfully) generally "objective" also acts generally without what is being considered "personality".
If we assume that a loss of personality is undesirable (which will eventually be explained), and also conclude that it is implicit that acting objective is motivated by its ability to increase satisfaction, then we can then answer this question: At what point should one stop attempting to rid themselves of biases? The answer:
Rid yourself of biases in order to enable objective reasoning until the amount of satisfaction gained by the reasoning itself or by solely quenching the desire to act objective does not exceed the satisfaction lost in the loss of personality.
The purpose of this post was to clarify one discrepancy I have with the above idea: Can objective reasoning be favored? Or can you say that the original bias is favoring the truth, in which objective reasoning serves as a vessel for that bias?