That doesn't mean tens of millions aren't vaccinated.
This is not what I've heard second hand from my Doctor source on the subject, who is a literal Dr. Know-it-all. He indicated that those infected would likely have the best immunity compared to those vaccinated. I trust his word very much.2) Infection provides less protection than one vax shot, even against the strain that caused the infection.
That's nice that you trust your doctor. I trust Fauci, Hotez and the other infectious disease specialists who have said categorically that the reinfection data indicates weaker protection (on average) from infection than from Pfizer or Moderna vaccines. Their caveat, that there is a paucity of data, makes me wonder how your know-it-all Doctor came to his conclusion.
The basic problem with infection-granted protection is that there's no guarantee the body targeted a stable part of the virus. That's why we have never had a coronavirus vaccine before--too likely for a variant to slip past it.
Infection-induced protection is probably very good--against that strain. Just look at the reports on the Sinovac vaccine--it's an old-style killed-virus vaccine and thus has the same old problems against coronaviruses. It worked pretty well in testing because it was facing the same version it was engineered against. Against the variants, though, the protection is nowhere near as good.