The Watch has a port for diagnostic purposes, whether or not that is accessible to the consumer is irrelevant. Consumers aren't likely to be running diagnostics anyway are they?
Sync and Backup are absolutely not the same thing.
Why bother obsoleting every lightning charging solution/accessory and then replacing it with a smart connector. That would be utterly pointless.
I haven't said has said nobody would've bought the iPhone 7, there will always be the lunatic fringe who will gobble up any old junk that Apple put out, but without the ability to plug in wired headphones of any kind there will definitely to be lots of people that go elsewhere, to think otherwise is throughly deluded. No, nobody can provide data to back this up because the situation hasn't even happened!
The lightning EarPods are compatible with any iOS device with a lightning port, so that is any iPhone 5 or later and iPad 4 and later, not many people using devices older than that. In any case al l of those devices,other than the iPhone 7/7plus, have a 3.5 mm audio jack so it is completely moot point.
On you point about the MacBook, yes some people are using primarily wireless solutions but many are just using a myriad of dongles. Got any data to back up your spurious point about wireless and the Macbook?
Ultimately for all the moving of the goalposts you are yet to explain how people will be able to troubleshoot a device with no ports (software restore is the first thing support will tell you to do for non hardware faults) or how developers will efficiently be able to use a device (be that an iPad or iPhone) with no ports.
But your point is that people need a port to plug in and backup their iPhone, whether the AppleWatch has a port or not is irrelevant if the customer can't use it, as you suggest is necessary. So for all practical purposes the AppleWatch is portless as far as the customer -- and your point -- are concerned.
Sync and backup are indeed different, but if you're going to debate these points you really should read up on them. Wifi sync will backup to the Mac as part of its sync functions. So yes it is performing the exact same function whether it's called that or not.
Do you even read what I write? I specifically stated they would not remove the ability to use wired devices but change from Lightning to something sealed like a SmartConnector or the inductive charging puck on the AppleWatch. I'm asking for data on your various other baseless claims for masses of customers not buying the iPhone because it doesn't have a headphone jack.
The Lightning EarBuds not being compatible with a Mac or PC, or anything buy an iOS device is NOT moot. Anybody who needs to use the EarPods with anything else, most likely will chose the adapter.
And why am I concerned with someone buying a rMB and using it innificciently? If someone wants to spend that kind of money and plug a bunch of dongles into one port, that's their problem. What does that have to do with the iPad? The same people can plug all the dongles they want into an iPad, which I've already stated won't likely lose its Lightning port for a long while as there's no need to -- heck once the iPhone drops ports altogether, the iPad might actually get USB-C ports as the Mac and iPad converge.
Talk about moving the goalposts ... Yours are all over the place. Do developers currently use the so-called "diagnostic ports" on the Apple Watch? No. Yet somehow they devlop just fine with no effective ports. As for trouble shooting, when Apple removes the ports, as they have effectively done on the Watch, they will have a new method to troubleshoot which doesn't need to be plugged into anything, just as the Watch doesn't, a point you conveniently continue to ignore. And if that isn't enough, there's the possibility that a SmartConnector port would provide this interface.
I can already backup to my Mac wirelessly, and restore from iCloud, which is why I haven't needed to plug in my iPhone to my Mac for years. The last time I took my iPhone into an Apple Store, they ran all of their diagnostics wirelessly! There is clearly a future here that doesn't require the Lightning port, whether you're ready to accept it or not.