While I agree reinfections are likely to exist in small numbers, the tests we're using are often not great so it's hard to say whether those were covid or something else.

This year I've been heavily sick several times (and the flu almost never caused me all this pain before in my life) and it was never covid.

If one of the test returned a false positive I would have been convinced it was covid. If I actually got covid again I would have believed I was one of the rare reinfections.