First of all, I don't see any ORD-BKK trips under $2950 on a Oneworld airline this year. You could probably find slightly cheaper examples but with the current price of fuel and Russian airspace being a no-go, I can't imagine you'll find better rates than that on many Asian routes from the US in J.

Furthermore, I don't know why you're so hung up on whose butt is in the seat. AA's goal is to maximize revenue for their airline and partners. If I could earn LPs on my wife's upcoming flight to Asia, I'd easily spend the extra $300 to send her on Oneworld partners instead of Turkish, but instead, Oneworld gets $0 from me and *A, which I don't fly, gets my business. I'm not sure what argument you can possibly make that makes it a bad deal for AA in this situation to allow me to earn her LPs there, especially considering PPRO and EXP are not even that valuable for someone who doesn't fly enough to organically earn them outside of elite choice rewards which, again, you need 30 segments to earn.