This is the sort of valid point that one will tend to avoid discussing because it is likely to be misused by the ideological critics of vaccination.

As an alternative I haven’t heard much of, updating the vaccines would seem to be a good option, as well? The first round was developed fast enough to almost outrun variants, so it should work quite well second time around.

It’s important to avoid the naturalistic fallacy: infection is not necessarily better protection. That is why, for example, tetanus and rabies vaccines work even when given after infection.