I think it's about options for players, some are strong others fresh and both want to choose an AI to their likings. Sometimes they are in the mood to get beat

I think it's about options for players, some are strong others fresh and both want to choose an AI to their likings. Sometimes they are in the mood to get beat maybe to learn new tactics and occasionally just a victim to fight frustration. What wrong with a strength option? I'd include an unbeatable entry in any case.