I think for the most part....people who got immunized....think in some weird way they are ‘protected’ and go out socializing (drinking, hanging out, not really doing social distance). So a few months down the line...they are shocked that the immunity didn’t come like they were ‘promised’.
This 3G/2G gimmick used in Germany makes you think that the vaccination is a big deal. Night clubs usually won’t let you enter unless you fit into 2G (immunized or recovered). 3G allowed you those two options, or testing in the last 24 hours.
No vaxx and mingle maskless with a LOT of folks.