To name one reason, because it was totally irresponsible to support lockdown hysteria based on Imperial College COVID-19 Response Team's inimical model, which already in late spring of 2020 discredited itself with a bang. To name second reason, because Fauci, who instigated the mask mandate and then forced vaccination, had too shaky scientific grounds for such a peremptory action.

Just find a courage to admit that quarantine pandemics was but a large-scale test of illegitimate civil rights restriction policy and economical self-harm measures in times of transition to moderately developed cyberpunk. ;)

Because of inconclusive result, more reliable and time-tested option of reboot appears to have been chosen. And lo, the proxy-WWIII in Europe immediately followed.