IMO, not an accurate characterization - it seems the flight was sold sufficiently, or being sold sufficiently close to the flight date ("later this week" is the clue here), that the lower fare tranches (N, O, Q etc.) were not available, therefore not part of the comparison.

It is, IMO, fair to say AA is selling opportunistically and is quite happy to sell discounted F (or C) fares as long as the cabin warrants it - and happy to sell higher priced coach seats to those who don;t figure it out, as you have.