No it doesn't, the devs refuse to provide stable in-kernel APIs because they want the flexibility to be able to modify them as they please when a better solution comes along. Also maintaining support for proprietary drivers is harder due to them being black boxes, not only in terms of debugging, but also in security and stability.

NVidia is basically the one major holdout these days, and its proprietary driver for Linux is very good, so it's not as if it's impossible to maintain a proprietary driver in the Linux ecosystem. The motivation here comes from Linux being huge in accelerated computing and 3d, not due to any particular love for Linux on Nvidia's part.

Indeed the lack of a stable interface has made it cumbersome to maintain a out-of-tree driver, which is GREAT since it means hardware vendors are more likely to open source their drivers or at least give enough documentation for them to be created by a third party. This ends up being a huge part of Linux's success, as it supports the widest range of hardware of any system 'out of the box', hardware support which is then functional on any platform on which Linux runs, which in turn is practically everything under the sun.

And if this wasn't enough, it is also a boon for alternative systems which will never see official proprietary drivers due to being niche, as they can port Linux drivers, or even add Linux driver compability layers.

As the situation on windows shows us, the alternative is drivers that are crap for other reasons. If Linux offered a stable binary interface for drivers, we'd have proprietary drivers that "worked" but were nevertheless still crap insofar as they were essentially malware, as is the case with this wacom driver.