It's true - the home theater industry could make equipment, or at least the brains of the equipment (normally a receiver these days), be more self-configurable. Would we see a sharp drop off in new AH membership? I don't know. Maybe, but if you have parents with Apple computers - you might be thinking, "no."
Why? Because their "user experience" is targeted at people with some assumed knowledge base. Apple automates certain things, but they don't "just work" like the commercials would have you believe. Plus, the more automated a system is, the more people will be afraid that they'll "break" it if they do something wrong (IMO). My dad screwed up something on their old PC once after a "wizard" popped up, and he'd just call me or my brothers every time a wizard popped up from then on because he didn't want to go through that again. So, there's always going to be people that need help getting stuff to work.
Also, I think that striking a balance between an "automated" user experience and a user-configurable one is difficult, especially when you combine in the price aspect. Not everyone wants to use equipment in the same way, or pair it up with the same stuff. "Hey, I plugged in my reel-to-reel tape deck and this stupid Apple theater thinks it should be surround sound." Plus, people buy the "cheap" receivers because, well, they don't want to spend much. Apple makes computers...but a lot more people buy PCs. I don't think it's because most people don't like Apple products (although, clearly some people don't), but rather because they have to pay more to get the same "specs." The "user experience" doesn't win them over. They'd rather spend some time getting it set up and save a few hundred dollars.
Details, details - but at the core of it, I agree with you, Tom. It could be more automated for normal tasks. I feel like you're trying to take away my AH bread and butter, though.