In the same way that people are dumbfounded that natural immunity from having it is superior than the vaccine.
It’s as if we all forgot how viruses work.
It’s as if we all forgot how viruses work.
One of the big factors of "better protection" of immunity gained after recovering from the virus is survivor bias. In data about mortality after reinfection there are no people who died after getting it for the 1st time. This leaves only ones who had body strong enough to recover.
There's no surprise that later that group fares better.