Germany here. It's a kind of a safety regulation. Think of it as a right that the employee has. The employee has to provide the equipment and supplies that y

Germany here. It's a kind of a safety regulation. Think of it as a right that the employee has. The employee has to provide the equipment and supplies that you need to do your work, and equipment that prevents "injuries" (wrong term for the long term effect of bad ergonomics) is amongst the equipment you need. So if you work at a desk with a computer, you are entitled to a separate monitor and keyboard and mouse. If you don't want to use the keyboard, you can set it aside, of course. But it's there for you to use it if you like.