vq, That is Kitty Jones' spin.
There are many people, such as T1 diabetics, who would be dead without insulin but are, nevertheless, capable of having a normal life, including work, with medication.
There is no suggestion in the DWP's actions that people should not seek medical treatment and be given appropriate medication, which might or might not enable them to work in some capacity.
The article contradicts itself anyway. It states that this man was working, despite his lung condition. It was redundancy rather than ill health which caused him to give up work and was the root of his anxiety and depression. Therefore, he was not unfit to work before being made redundant.