I'm afraid I don't understand the question. Can you explain a bit further?

Your response to the prior implied flagging is based on a deliberate choice of karma, to widen the gate on who can flag.

I was asking if there is not an inverse function, which would be a higher karma unflag operation, on the assumption people who flag up are being somewhat incautious and a smaller set of people could say "no, this is worth seeing"

I have no problem with flagging per se, or with my own ability to see flagged content.

There's no specific unflag feature, but upvoting has an inverse effect on flags.