I agree. The problem is that these cases exist - and it can be as simple as being temporarily ill (food poisoning can really impact you). I think this argument

I agree. The problem is that these cases exist - and it can be as simple as being temporarily ill (food poisoning can really impact you). I think this argument is important to answer because if the answer is "everyone who has a disablement card can ride a car", then we need to go to the next step in the discussion - for example this summer I got so ill that I was unable to walk 700 meters to the store. IMO we should talk about all such cases before if we talk about even a partial ban because it could seriously impact someone, even if their case is only temporary. If the main point is "we should promote using bikes/public transport instead of cars", I think no one disagrees about that - and that's why an extreme case gets mentioned, because there is no point in talking about a mild case and there is still a lot of people that want a full ban.