I disagree heartily. D&D is fun for a lot of different people for a lot of different reasons. Those different reasons don't have to be contradictory; and a good DM knows how to run a campaign that caters to the fun being sought by their different players.
I'm not a Char Op type or min maxer, but I think the people who are into that provide an excellent foil to those that focus only on the ability to tell a story. Having a game that allows you to create grand stories AND runs like a well oiled machine makes the system ascend overall.
Just like any group of people, you have those who are overenthusiastic or fanatical. This is not true of every min maxer, and in my experience not true with the majority of them.
In fact, having that sort of player in a campaign you run can be a very fun challenge. It forces you to engage your players at different levels (story, exploration, combat). So called 'power gamers' usually want the effort they put into the game while not at the table (the min maxing part) rewarded in game. This can easily be done by putting them into situations that test their capabilities. You can do this while maintaining fun and focus for all players.
To get back on the immediate topic, however, I found the conversations within the CharOp forums of a lot of use as a DM for what to expect from my players and their power levels. I think we should be welcoming of all aspects of our hobby, even those we don't enjoy ourselves.
In the end, it's very easy to not go to that section of the forums.