Look in the lancet reports which has all the data. It isn’t going to stop 100% of transmissions and without any restrictions it’s still a very transmissible virus, especially the delta variant. The vaccine loses efficiency after 6 months if only given in 2 doses which also explains places seeing some growth in figures which is why boosters are important .
The IFR for Covid and flu aren’t similar either, especially without vaccination it’s about a magnitude greater.
Again not being pro or anti pass but not sticking to facts undermines arguments.