Question on Corner Position (3-3 follow up)

[Kirby]

I think the black moves in Diagram A are much better than passes, so are not “losses” in an absolute sense. It’s not just a feeling of satisfaction I have. The stones have positive value.

Any loss is from the opportunity cost of not playing a better move. In this case, there’s a weakness I leave for the opponent to potentially exploit. But it doesn’t mean that the stones on the board don’t have value - they’re quite nice to have there, even if the opponent got a better deal.