What's contradictory about it? I'd greatly prefer the set-up that PS3/PS4 has so that I don't have to have anything plugged into the console to have increased storage space, but if the only option is to use some sort of external storage, then I'll deal with it if I can get a decent set-up that works for me since it's not like Microsoft is going to ever offer new models with that feature. I don't think I ever said anything about the size of the drive other than using 2TB for the examples when pricing it out for comparison costs. If I'm going to go with an external drive for the Xbox One since that's the only option, I'll use normal 3.5" HDDs that are fairly cheap to expand on since size is not as much of an issue and not 2.5" drives or whatever you're obsessing about. What's outrageous about that? Feel free to tell me what's stupid about what I just wrote. Hard drives aren't known for having incredibly long shelf lives, so being careful in regards to the likelihood of needing to upgrade/replace the drive seems like a smarter way to go rather than a proprietary external drive without that option assuming that your lack of an answer is confirmation of that aspect of the external drive you linked. You talked about how you would prefer to just have the ability to put a hard drive in and have the flexibility to swap it out at will, which is exactly the same thing you could do with an external hard drive. You also say how hard drives don't live forever, which makes me assume you'd replace the internal one when it breaks, but again that doesn't really make sense since you can do the exact same thing with an external one. (At likely the same cost to)
No, I think it's pretty clear that I'd prefer that Microsoft designed the Xbox One for both user replaceable internal hard drives and external hard drives, but that's obviously not the case. I stated my wishes that Microsoft learned more from their experiences with Xbox 360, but then moved onto the real world scenario of what sort of external HDD I'd prefer for my Xbox One. No it seems like you've only voiced your displeasure to having to use an external hard drive, so I don't know why you're now saying you've been talking about how they should have added options for them both together.
Games are only getting bigger, so 4TB could go quick if Microsoft is smart about getting lots of good games on there and the whole Games with Gold problem expands nicely over the next few years. People used to think the 20GB HDDs that came with the Xbox 360 at launch were huge, so you can never have too much storage. It just seems that big now because there's hardly anything out there to fill it up. But this console generation is basically catching up with what PC's have been dealing with file size wise, and most gaming PC's are fine using 4 TB HDD's for storage. I know I have a crap ton of games on my 3TB drive and it isn't even filled.
How does two 4TB drives turn into 16TB of space? While I said you can never have too much storage, I'm not eager to have multiple external drives hooked up to one device. One is more than enough. Apologies I didn't exactly mean the two hard drives, I was quoting the maximum data that the Xbox One can have, which would mean using larger HDD's and perhaps more USB ports for that maximum.
Now that I've hopefully better explained my thoughts, feel free to let me know if you still think I'm contradicting myself. Posted thoughts and I'm still left confused, you seem to be particularly flip-flopping since through the whole discussion you've basically voiced extreme displeasure to using external hard drives, and are just now saying you've been pushing for a system that uses both external and internal.