First of all all it takes some days for the Protection to begin from the first dose, and then there is evidence which I have put on here here that the level of protection Falls as time passes so your figures are simply too optimistic, based on Hope rather than facts it is simply a gamble which is unnecessary,the truth is they don't have enough stock to do the job properly it's a simple as that.I totally agree with sentiments around maximum benefit for us all. So let's examine your figures.
Assume your higher figure (95%?) achieved after 2 doses. (stopping hospitalisation)
Now let's assume only 75% after a single dose.
Multiply the figure achieved by the number helped to give a figure for total benefit. (assume 3 weeks from now for ease)
Today we have had 21 million fist dose.
So 75%x21 million is roughly 15 million kept away from hospital.(potentially)
Now assume your regime of 2 doses. Halving the number helped. 10.5 million x95%.. Around 9 million kept away from hospital.
Your argument is not correct around it being a political decision. If it is, it will fail, where does that leave BJ? The decision is made for right reasons by those making the decision. Yes, it could be wrong, but its looking as though it is not. Either way calling it political is misled. Even from Johnson's point of view it must be a Sage decision. If its not his political career is absolutely on the line. Short term success (as I explained earlier) is of no use to anyone. Johnson included. Getting a good start in a marathon is important but crossing the line much more so. He knows full well his political future will be decided in perhaps a year's time. He can't risk not getting over the line by jeapordising race with a faulty start. Nobody can.
Your argument defeats itself. Why would he or Sage destroy a good finish for a lead in opinion polls today? It would be sense less and he and Sage simply aren't.
And remember this the 15 million you say they could be kept away from hospital might will not be for more than a week or two