You can buy from Apple a computer that's locked down (an iPad), or a computer that's not locked down by the author's definition (a MacBook). It's a matter of consumer choice, not the company insisting on control of your devices.
The non-locked-down machines come in a different form factor than the locked-down ones - they usually have a physical keyboard and a larger form factor to accommodate that. This is partly for historical reasons, but very largely also for consumer choice - and also it makes sense that on the more flexible machine users are more likely to need a keyboard. This is all fine, you can't expect every company to sell their products with every combination of features.
I find more convincing the arguments about e-waste, but they need to be framed like that: sometimes we should mandate consumers get something they don't particularly want, for the greater good.