Which is why from medical and ethical standpoint the vaccine passports that are oh so popular never made any sense. Vaccinated people can and do spread it. Even among each other. So what is the point? For proper control the test passport would have been the clear solution.

But I take there are political opinions behind this...

The point is that vaccinated people have lower infection rates and if they do catch, they spread it less. That is the justification for having less restrictions on vaccinated people.

Still non-zero infection rates. Also it is clear that they have lead to increase spreading as people take less precautions and do more risky behaviour like drugs...

Non zero people die with seatbelts too.

Remember when we were told seatbelts would make people drive like lunatics so we shouldn't legally require them? (I do.)