I think that's the wrong analogy. A more correct one would be "Should we blame a car company for a broken engine, that was modified after it was sold to you?".

A kernel level driver from a 3rd party is something that you willingly add to the OS, it wasn't there.

Just because windows allow you to do it, doesn't mean you should.

I mean, you can apply some dangerous mods to your car's engine, but you probably shouldn't, and if you do, it's your responsibility, not the car company.