It might be worth clarifying that Wacom is not taking that approach. But their statement there suggests that the underlying reason for lack of hardware support in Linux is the OpenSource nature of the software.
> And if I want to abuse some piece of hardware, such as making a musical instrument out of a pile of floppy disk drives, what business is that of the manufacturer?
As an example (maybe not a fair one) we can ask Tesla why they don’t want to expose some/all APIs that Tesla owners might want access to. I expect they would bring up a thousand reasons why, maybe safety related, maybe not.
I generally agree with you though, you paid and own something, and you wish to use it as you see fit. Unfortunately it seems like what we think we own and what we actually own are in some cases two separate things.
How can documenting something be an undue burden? In order to write the drivers that they do write, for say Windows, they must have written some documentation.
And if I want to abuse some piece of hardware, such as making a musical instrument out of a pile of floppy disk drives, what business is that of the manufacturer?