You really seem to be a bit thrown by the concept of something being very effective, but not 100%
@dfstock:
ME: Okay. If I get the poke, does that mean I won’t get sick?
BRITAIN: Nope. We are just now entering a seasonal spike and about half of our infections and hospital admissions are poked people.
Hello from Britain, where while our case numbers are up, the ratio of cases to deaths has changed completely since our vaccine rollout kicked off. Considering that the vast majority those who are eligible here are vaccinated (88.5%), and as the vaccines are incredibly effective
but not perfect, it is entirely to be expected that over time, we'll end up with the majority of hospital admissions and deaths from COVID being from vaccinated people.
Just as the fact that the overwhelming majority of people who die in car accidents were wearing a seatbelt, doesn't mean that seatbelts don't work incredibly well, just that the overwhelming majority of people wear them, and they aren't able to prevent every death.
Here's how our second and third waves worked out, before the vaccines and after them:
ME: Wait! I just want to make sure I understand all this. So, even if I ALREADY had Covid, I should STILL get poked, because we don’t know how long natural immunity lasts, and we also don’t know how long poke immunity lasts. And I should get the poke to keep a poked person from catching Covid from me, but even if I get the poke, I can give it to the poked person anyways. And, the other poked person can still easily catch a serious case of Covid from me and die. Do I have all that right?
Yes, you should still get vaccinated even if you had COVID before, because the immunity you have isn't binary, we know that getting vaccinated improves it, and there's no real downside to doing so. It's all just more training for your immune system.
Being vaccinated significantly reduces your risk of being infected, which also reduces your odds of infecting others, it also massively reduces your risk of getting seriously ill, and gets quite close to entirely eliminating your risk of dying of COVID. It isn't perfect, but neither are seatbelts in cars, they still save a lot of people's lives anyway and there's really no downside to wearing one, just as there isn't when it comes to getting vaccinated.
Also to be clear "poke immunity" and "natural immunity" aren't like separate things our immune system files away in different places. Our immune system really has no concept of what a vaccine is, it just recognises things it thinks could hurt us and creates antibodies and t/b cells in response. If you've previously had COVID, getting vaccinated will give you even more protection, and it's not like our immune systems have some kind of opportunity cost thing going on where your protection against other things goes down if you have more protection against COVID, or that the protective cells created in response to prior infection are replaced by a whole different kind via the vaccines.
Breakthrough cases means it is not preventable. If it was effective then breakthrough events would not occur, Delta would not replicate and would not be transmissible with variants as an eventuality.
On this basis, the fact that some people still die in car accidents even though they wear seatbelts, would mean that seatbelts are not effective. Please try to understand that most things, especially infectious diseases, aren't a binary.