Nope!!. The world is a big place. If at your age, you cannot yet appreciate that the person who gets to be the chief advisor to a State is both competent ,in their discipline, and with a huge political nous. It is just the same in any of the Churches, the Police forces, The Military, the Universities , . The core discipline in which they gained prominence, is no longer relevant,it is the relationships which do...and that is politics.
I have no doubt they looked at two very serious things.
1 the then current infection rates and its very probable death rate spiral..The UK was world beating at that time. We are talking late December January
2 The Short term effects on hospitalisation with a rollout of either vaccine .They were looking at an 8 week horizon.
They were vindicated in that decision. What they could not allow in their calculations, was what the probability of inducing newer variants.
Just so we are clear, I have no vested interest in whoever occupies no 10. I don't care about their politics or their personalities,or their names.