AA flies many routes lacking true competition from legacy airlines. E.g. STL, CLT, PHL.
But, some of those routes have competition from LCC e.g. Spirit, SouthWest or Frontier which some corporate programs forbid or alternate airports (e.g. ACY/TTN vs. PHL).
As a result - I believe they are pricing for the audience as a corporate travel require to fly out Monday AM and return Thursday PM will pay $600. A leisure travelers is comparing AA with in-cabin baggage vs. a LLC without in-cabin baggage.