The thing is having your own chocobo has been out for awhile. SE could release sellable ones, or like someone said make people who bread them able to sell them to other people.

Say if you bought it from a NPC for example it would have like average speed not fast like the top breaded ones.

Everything in FFXI doesn't have to be a painful grind this just would make things easier on people. A lot of people don't want to invest huge amounts of time to playing a video game each day.