I've said this before... audiophiles of the type who frequent discussion boards like this are hobbyists. They like playing and experimenting with equipment. If they buy a powered speaker, they've just given up one of the big components with which they can experiment.
The OP's suggestion probably works much better with those who are only interested in music playback but consider the equipment end of things a necessary evil. For them, simpler is better as long as they are getting the sound quality they like.