It is very encouraging that this appears to be a science led decision.
Unsure why I've been downvoted, but if you've worked in FAANG level tech and with scientific staff of the CDC/FDA, you would not think that the caliber of people on either side was much different. There are a very, very large number of Moderna and Pfizer/Biontech doses going out at this point. The bigger risk is 501Y.V2 and company evolving to escape the vaccine, and that is not going to be fixed by a week long pause in J&J/Jannsen to identify the source and treatment for the errant platelet response.