I'm not really sure what you're trying to say here, it doesn't seem relevant to my comment.

My point is that using the fact that science changes as new information comes in, thus the answer science gave us yesterday may be different from the answer science gives us today.

The parent comment is using the changing conditions around vaccines, the fact that they said 1 shot, then 2 shots, now there is talk of boosters, as evidence that it was irrelevant and should be ignored. My point is that must expect any answer science provides to potentially change. If people want an answer that is unchanging, science cannot give it to them.