why are we going all 'emergency booster' mode when the rest of the world isn't?
Because most of the rest of the world has lower rates of infection, hospitalisation, and deaths... due to following expert advice including the WHO on Vaccine Plus. We went for Vaccine Just.
Our Plan B? Basic pandemic infection mitigations already in place in other countries.
They never stopped wearing masks in public spaces, and they have vaccine passes for entry to gatherings including shops, restaurants, and bars.
They've better protected their hospital capacity and the vulnerable (and all patients including non Covid) by already having mandatory vaccination requirements for those working in health and social care.
Many also have mandatory vaccines for other jobs particularly public facing.
Some have better ventilation including HEPA filters.
Most have double jabbed 12+, and some are already vaccinating primary aged children (I suspect we don't have enough supply).
Some countries including in Europe have, in addition, to mitigations, acted swiftly to implement some form of restrictions - semi lockdowns and/or curfews.
Also, as it happens many other countries are doing boosters.