That is what I also wonder, who added that tootbrush statement there? Given that Oral-B has done replacable batteries for years, and they have dominant position, I'm thinkin that statement didn't come from lobbies. Maybe someone who are making the law is reasoning with itself or small group and didn't know that replacable batteries in toothbrushes are already a thing.
Oral-B is an American company. Phillips is an European company. Phillips toothbrushes don't have removable batteries (at least none of many I owned had them).
Now connect the dots. That is how things work in EU.
You can asbolutely redesign the devices to fit the requirement.
It's absolutely a result of lobbying.