[ifyoubuildit]

> This analogy doesn't make sense.

Do you truly think this doesn't apply at all? I see a lot of people say "it's a vaccine, we know how vaccines work", just like I'm saying "it's a car, we know how cars work".

In reality, implementation details matter. A Tesla isn't a Ford (and especially wasn't for the first GA model). You can predict some things, like maybe the body will rust in similar places. But what does a gas tank tell you about how a battery will hold up over time?

> Because the vaccine can't continue to affect the person when it's out of their system. The vaccine is entirely gone within a couple of months, and only the immune system's "learning" remains.

This is a prediction that comes from our experience with other makes/models of vaccines, and one that will hopefully come true. In the case of a never infected/never vaccinated person, I'd put my money on that prediction based on what I've heard about covid. For a person who has already recovered, leaning on that prediction feels unnecessarily risky, especially when as you say, we don't fully understand the long term risks of covid either. Why add more risk on top of that?