I understand that is their position, it's just a position that doesn't make sense to me. Any game where to players are pitted against each other and both are striving for victory over the other is inherently competitive, even if they aren't going for each others' throats. A well-constructed rule set benefits even the casually competitive as well as the hardcore player.
Why should the onus be on the TO to clean up the rule set? I don't agree with that idea at all. TOs lives can be made very miserable by poorly written rules, which I have witnessed firsthand.