Is the science clear on that? My impression is that it’s not, but I haven’t studied it closely. Do you have any references I could go study, please?
There is some clear science that indicates, for a brief window after recovery, the antibodies are high enough that a vaccine won't necessarily boost the defenses for the immediate future.
The idea that having the disease is a substitute for having a vaccination is propaganda, put forth by people who are not motivated by the health of the public at large.
I had COVID in December. In January, I had a moderate level of antibodies. By April, when my opportunity to get the vaccine came up, the antibodies were down to about 15% of where they were in January.
When my opportunity for a booster comes up, I'll have the antibodies checked again, out of curiosity.