It figures that they wouldn't want to have either Ash or May win over the other. If May beats the seasoned trainer, it would be unrealistic and people would complain that she was turning into a canon-Sue. If Ash beats the female co-ordinator, it might look as though the writers were undercutting May's profession, suggesting that co-ordinators aren't really any great shakes at battling - or worse, that girls can't win against boys. It doesn't put out a great message. Although TR interrupting is still a cop-out. But hey, that's what they always do. Ash and Misty's gym battle (for which rather more was at stake) is a case in point.