Not sure if the risk/benefits analysis is that simple, because the risk/benefits evolve over time. At the beginning of a pandemic it is definitely beneficial, b

Not sure if the risk/benefits analysis is that simple, because the risk/benefits evolve over time. At the beginning of a pandemic it is definitely beneficial, but it changes when either spread is too high, or other measures (vaccines, therapeutics) become available. This is evidenced by the fact that contract tracing continues e.g. for monkey pox.