I am not saying outright that the pause is not justified. But it has a substantial cost, and it would be good to see that our health authorities have considered this and weighed the balance of costs and benefits. e.g. it might have made sense to pause J&J for under age X and continue it for over age X, based on relative risk.

I don't agree with your analysis, I think you can see it entirely the other way, that both this pause and the initial "wait and see" attitude towards Covid are the result of an excessive bias towards the status quo. I remember back in January-February 2020 when people were saying it would be crazy to just shut down air travel, think of the massive economic cost.