It's a bit like the tea model for consent.
The tea model is useful for teaching 12 year olds (and most men, tbh) about consent practices. But the moment you start going around screaming at people for enjoying somno (or even just _fanfic_ involving somno) because "DON'T GIVE TEA TO SOMEONE WHO IS SLEEPING" you've lost the plot and the model flips from being not just no longer useful but actively harmful.
The nazi bar is a useful model, but it isn't hard to find examples of people using it in a way that is not just misusing it, but misusing it so badly that it becomes actively harmful as an allegory.