If you read the whole post, while I still think he’s wrong-headed, his position isn’t completely nonsensical. To start with, he’s specifically talking about the UK and its National Health service. He’s saying the rationale for mandatory vaccinations is to prevent the NHS from being overwhelmed. Last year, when the pandemic was at its height, it seemed like the NHS might be overwhelmed, so if a vaccine were available, it would have made sense to make it mandatory. Now, though, voluntary vaccinations and other measures have brought the case rate in the UK down enough that the NHS is in no danger of being overwhelmed, so a vaccine mandate is not necessary anymore.
NOTE: I do not agree with that position, and I think he badly misunderstands some key issues, but it’s not quite as nonsensical as that out of context snippet makes it seem.