There should be no classic controller. There should be one controller capable of doing everything reasonable well. If you can't imagine such a thing, keep in mind that Nintendo spends millions designing controllers. They'd figure it out. See, I'd be more forgiving if the DS didn't prove that a balance can be met. Developers still design games around the touchscreen and these aren't isolated cases.
They are worried about developer lazyness, not the quality of their Wiimote. If they weren't confident in the thing they would have packaged the CC so if the 'mote fails the CC can pick up the slack. They didn't, they chose to keep it as Wiimote + Nunchuk.
Sure, that's the reason. It has nothing to do with the fact that Nintendo charges $20 for something they could have designed into the Wii remote/nunchuck combo in the first place. Nintendo is add-on crazy and 3rd parties are being lazy anyway.
I see the Wii remote/nunchuck combo as a work in progress. There's definitely room for improvement and obviously Nintendo thinks so if they're releasing Motion Plus. Every defense of the Wii remote's design is easily torn down by Nintendo themselves. For example, if more buttons causes confusion, why are there so many buttons on the DS? And yet, it works. No one is complaining that there are too many buttons on the DS. Even then, I'm not necessarily advocating adding more buttons. If I were to redesign the Wii remote, the first thing I'd do is get rid of the D-Pad and make the A button into 4 buttons (which almost mirrors a D-pad anyway). Technically, that's one less button, but it'd make a world of difference. I hate when actions are mapped to the D-pad. It's not comfortable in my opinion.