Fatbikes and others are a joke. They are the humvee of the bikes. If you wanted to bike, go get a bike for 50€. If you want to use a motorcycle, get an old motorcycle. Those abominations are only there to count as bicycles so those fucks can use biking infra

As your link explains the proposal is just to ban them from parks and other low-speed pedestrian areas. Amsterdam hasn't banned cars, they're not about to ban ebikes.