> If a new variant has a spike protein different enough, then you will not be in a better situation than an individual with no vaccine and no previous contact with the virus.

That's quite a different claim to "it permanently reduces your body's ability to learn how to counter different parts of other versions of COVID".

> In contrast, someone with natural immunity would have the ability to produce a wider range of antibodies that target many different parts of the virus

This is a very different argument that natural infection gives more effective immunity than vaccination, and the empirical evidence does not seem to agree.