"If Apple added everything you wanted to the phone it would be prohibitively expensive"
Yeah, that would make a big difference.
"...including cars, speakers, alarm clocks, blood sugar detectors etc. use the Dock connector. It is ubiquitous. You cannot do this with a USB connector."
Huh, the USB connectors I use will be surprised to hear that. And even if it weren't already the case, exactly what would be stopping people from making docks with a universal standard connector instead of Apple's proprietary one? I mean seriously, some of the arguments in favour of Apple and their products are entirely reasonable, but being the only company not to refuse to use a standard charger/connector that users have been demanding pretty much since mobiles have existed really isn't one of them.