I'm okay with bulkier, replacable batteries which are reasonably cheap. Most people I know would like it too. Are we not a part of "the market" ?
As a kid I would confidently open up any electronic device without worrying too much about breaking it. A radio, tv, toys, remote controlled devices, speakers, headphones, laptops, disk drives, etc. These days I do not find myself opening up electronic devices as much. More from them fear of breaking them or the hoops that I have to go through to do it.
That exploration really taught me valuable things.
I don't have kids yet, but if and when I do, I'd want them to open up anything that they are not sure how it works internally, under the shiny box. I am not sure if they will be as confident about opening up common device of their time be it a mac or an iPhone or a tablet or any such "tightly locked" device.
I hope I can build, nurture and keep their curiosity alive.