Well the reason I asked is because you did explain how you see it, but the only use I can see is the emotional manipulation of connotation management. I guess I just have this particular viewpoint.
The biggest use for me is self-management of emotional reactions. When I differ with someone apparently reasonable, I wonder if it's a difference in viewpoint or a difference in bias.
For example, as a youth I had no interest in team sports. American culture, though, crams team sports down your throats. It's just assumed that you'll be a partisan for some team, and you're treated as weird/defective if you don't. This was irritating to me, and eventually I developed a deep bias against all of it.
Older, and having lived for years among nerds, I still maintain my viewpoint: I have no interest in team sports. I still agree with this:
But because nobody's been a dick to me about this for years, and because I've become friends with people who do love sports, I've mostly lost my bias. I no longer bristle when the topic comes up. I can give a reasonable accounting of why sports fans love sports, and I can give a balanced list of the social costs and benefits. I still have a mild bias against the topic, but can recognize and override it.
The next-biggest use for me is evaluating other people as sources. I'm more likely to trust somebody if they display awareness of their biases, and especially if they're able to say nuanced things that at times cut against those biases. Because if they aren't wrestling with their own biases, they've outsourced the job to me.
Is that helpful? If not, try asking some sort of question, because you've left me just guessing at your objections here.
