My gut reaction is how stupid can you get? If the AFM permits 15 kt tailwind then why not utilise that facility which gives flexibility and has commercial merit?
I operated the B 737-200 for several years and we had a 15kt tailwind limit. I lost count of the number of approaches and landings I made at certain airports with a significant tailwind which avoided a hairy circle to land or even a diversion.
We are assuming that all the normal performance A regs are being complied with and all is still at the discretion of the commander in the specific situation.