I'd think if you truly cherish that goal (as I do) you'd have noticed by now that no single device or technology represents a step of any significance in
any direction.
It wasn't the existence of the internet that changed the creator:consumer ratio for the better. It was the use of the internet as such. And that use exploded thanks to any number of consumption-focused technologies along the way.
Consider that even if no-one creates long-form text on an iPad, it's existence as a consumption machine might re-popularize the format and draw more creators to write for digital bookstores, shifting the creator:consumer relationship thanks to the ease of entrance (compared to dead-tree publishing).
Or for a more proven example: consider the App Store. Reviled-since-inception by techno-freedom purists, its net effect has been positive for entire classes of software that are as-of-yet implausible via the internet.
Though the store serves only these consumption-focused devices, the audience those devices attracted and the comparative low barrier for entry by creators has drawn creators and been a huge step forward.
Windows tablets have had more pure potential to push the creator:consumer ratio forward for a decade and they've done essentially nothing. How useful is a world-view in which they're viewed as a step forward and the iPad a step back?
All that aside, the core argument is still bogus. The iPad is getting a rap as a media consumption device solely because it's bad at text input without peripherals.
Well, guess what? Any form factor is bad at some Arts without peripherals. And peripherals often dictate ergonomics. Keyboard/Mouse PCs suck at digital painting, a/v capture, a/v editing and any number of disciplines without peripherals. We don't pan them for not being a creative panacea out-of-the-box. And we certainly don't begrudge laptops their convenience, even though a digital artist has to lug around a cintiq to do decent work on the road, and is thus limited in use cases.