Otherwise, what is making the difference in hospitalisations / deaths and even the case numbers in the current peak?
The fact that the vaccine protects the person taking it, which is the primary effect, and which I already suggested.
You reject the hypothesis that vaccination is responsible for the reductions
You should read more carefully. I reject the hypothesis that me being vaccinated causes a significant reduction risk to others (which is the topic of this conversation). It would appear that the vaccine is actually working, in that it is protecting those who take it. "Vaccinate the vulnerable", right?