I think you're saying that a positive for antibodies result in a few days after the vaccine does not imply immunity
Yes, that's exactly right.
If you DO have antibodies after the vaccine, it's still possible that your antibody levels are too low and you ARE NOT immune.
If you DON'T have antibodies after the vaccine, it's still possible that your T cells are now high enough that you ARE immune.
(I assume you mean a few days after the second vaccine, since it would take a while to get high antibodies after the first.)
however I personally still think that a high antibody result x amount of days after a vaccine, should imply that your vaccine is working.
It is possible that in some people the vaccine "works" to produce antibodies, but doesn't "work" to confer immunity. But you're not entering a contest to see who gets the most antibodies; (semicolon!) you want immunity. The experts are still not sure what exact value for antibodies/T cells corresponds to immunity.
You're conflating two ways of thinking about this: What's the current scientific understanding? What do I personally think is likely? I've tried to answer the first, and you're answering the second.
IME, not e/o who took the vaccine automatically tetsed positive for antibodies
Could be that they'll take longer to develop antibodies. Could be that their T cells are high, and just haven't been tested for. Could be that they are less likely to be immune. We just don't know yet how to answer that for an individual. For a large population, like the 20,000 in the clinical trial, we can say that there's a high probability that people will be immune after the vaccine. But we can't answer that for any one individual, and don't know why a small percentage of people still got covid after the vaccine.