Trying to understand why it would be better to construe it that way.It seems to me "bias" is better construed more broadly as a range of perceptual errors - which arise from the way our brain works in trying to understand reality - continuous with all sorts of perceptual biases like optical or audible illusions.
As far as I know, the sciences tend to separate human perception and errors (psychophysics) from forms of bias. The former is what we all perceive, right or wrong, based on the way humans perceive things whether sight, sound, taste, smell. The latter is what we might perceive based on our experience, possible reward, and the other factors mentioned in posts above.
Why is it better to lump them all together?
Loudness for example. We all know Fletcher, certain frequencies sound louder to us all because of our auditory system was designed/evolved that way. Listening to a band, musical work, a DAC, pair of speakers, whatever can be pleasing, displeasing, or no different because of bias (and all of the sub-categories thereof). Don’t we need to keep them separate to understand what is causing what?