"The assertion that people in privileged positions can never see their own privilege is refutation-proof"
Actually, I never said this, and I wouldn't. Most people who are privileged don't directly realise this, but it is common for concerned parties to learn about privilege to begin to "check their privilege" - to question how their privileges affects their interpretation of something.
I am privileged in some ways, and not in others. Generally privileges are treated as being different and hard to compare, because "oppression olympics" (arguing some are more harmful than others) never actually helps the discussion, and generally leads to people forgetting to check their privileges - who am I to speak for the experiences of other minorities?
The fact that you act amused at "not-abused" as a privilege is part of the whole problem, especially when you consider how this intersects with with privilege (or lack thereof) issues.
The concept of intersections between privileges (or the lack thereof) is important - that some combinations of the effects of a privileged society are worse than others.