Fine story, mostly. But the correlation with a removable iPhone battery is..?
That I wasn’t not exactly sure what you were taking about.
First off, it undercuts their design philosophy.
Apple is about minimalism and purity in hardware design. It's the same reason that the iPhone has four physical buttons. In the eyes of Steve Jobs and Jony Ive, perfect products are made by cutting out everything not absolutely required in the design. To them, it's about creating products that are cut down to their absolute most basic form, with nothing standing between the user and the device.
Apple products aren't about having the most features, or being the "most useful", they are about distilling out the purest mixture of form and function possible.
Remember the old iPod Nano? The one with no buttons? That's one example where the formula didn't work. No one wants a media player with no buttons. While it may have been pure in the eyes of the design, it was a useless product. In the iPhone and the latest run of iPods, Apple has found, to them, a perfect balance of form and function. The devices are beautiful products that retain full functionality.
Note the "to them" up there. It's obviously not something everyone agrees upon, but this is through the eyes of Apple's design department, not the general population. And while you may disagree, you have to admit that they're close to correct. No media device saw the success of the iPod in its heyday, because of the flawless mix of usability and beauty.
You see the same philosophy in the lack of removable battery. Apple decided that would sacrifice the integrity and the beauty of the phone were the battery removable, and they're right. Having a solid frame with an internal battery makes the phone more durable than it would be at the same form with a removable battery, and the battery lasts longer too, because it can be built larger within the phone. Why not just make the phone bigger? Because that would compromise the design principles.
Again, Apple is trying to make the most pure product possible, in their eyes. Thin, light, yet uncompromising simplicity is the goal here. That, not a huge feature list, is what Apple believes makes a product good.
Up until the iPhone, phones were devices used by phone companies to sell service plans. People talk about the "planned obsolescence" of the iPhone, because of the removable battery, but they don't remember the crap phones from more than a decade ago that fell apart if you sneezed on them. Sure, you could replace the battery, but the battery lasted like six months.
Apple's design philosophy, whether or not you agree with it, has totally reshaped the phone and computer industries over the past five years, because it works.
Sure, there are many users who want it. There are even some people who need to be able to swap out batteries on a regular basis. But Apple doesn't care about that. If they listened to what people wanted, we wouldn't have the iPhone, iPad, or anything else like them on the market. No one wanted an iPad when it was announced, until they started using them. It's sort of a niche feature, and time and time again, Apple has proved that they don't care about niche features or markets (See: 17" MBP, XServe, Mac Pro, iPod Classic, or other useful products that Apple has either discontinued or left for dead.)