Absolutely! Who cares about having high quality cameras, GPS, internet and all those other bells and whistles. I'm gonna switch to using carrier pigeon.
That's a good question, I can think of quite a few ways. Per example the metal connector base coud be used as a screw to hold the case together, and the internals could be kept in place in a sandwich like fashion by a plastic support. Everything would be tightly secured by the base screw, which could be unscrewed to open the case and grant access to the battery for replacement.
But Apple's engineers aren't really that much into clever internal product design, they're more about the finish, aesthetics and low manufacturing costs. Who cares about recycling when you can just use tape and glue. Leave the environment speech to marketing.