Except the jabs only give 33% protection against the Delta variant after one dose, so it’s quite feasible the 50% of adults that haven’t had the 2nd jab could get seriously ill with covid. Hardly ‘being a moron’.
Seems far more sensible to delay the final relaxation of rules such as masks and social distancing to slow the spread until a greater percentage of the population have had both doses, which gives much greater protection.
‘Herd immunity’ is considered to be at around 75% of adult population having had 2 doses I believe? So not too much longer to wait.