The whole Covid thing isn't black and white.
My DP had it recently and he's on immunosuppressant drugs. He's been vaccinated many times (maybe 7?) and still caught it (maybe in a medical setting.)
He wasn't that unwell when it was at its height, but he's felt under par now for 5-6 weeks.
For MOST younger and healthy people, it is like flu . Or a cold.
Although more people died from flu last year than Covid.
Flu can be very serious.
It's like all viruses. Some people have severe reactions and long term side effects. Others don't.
I've had every vaccine available (I'm over 50) and will continue to have them.
It's not a rule that you won't get Covid if you've had the vaccine.
Me and DP have been VERY careful for 3 years. We've not been hermits, but have avoided crowded cafes, don't go to pubs, rarely eat out, and trying to figure out where he got it is unclear. 3 out patient hospital appts and one trip to a quiet cafe.
Obviously not everyone is testing now and that's why it's easy to catch it.