Also, in general you don't want your immune system to be more aggressive/destructive than necessary when you consider having to rebuild tissue afterwards, which also might include more risks the older you get.
In the case if an infection not seeming life-threatening to your body, a softening of the overall reaction might actually just be the right path to persue. The question is whether we want that in this case or whether we want to further move that towards a more protective optimum in the future with these insights.
For the "I knew it" and "we should have waited" discussion, I personally prefer an early protection, even with a lower reaction, that still keeps me from being hospitalized over being nakedly exposed like we were in the early days of that pandemic. We might have forgotten about this with the current "mild" Omicron variant.
I would love to see the study include severe breakthrough infections, if there are any, to see if the dampening effect and antibody distribution would be different in these cases.