> Seems to me that Omicron is essentially a vaccine in its own right. Highly attenuated and extremely mild to non-existent symptoms.

No, not really. Fully vaccinated individuals in highly vaccinated populations who contract covid tend to experience mild to non-existent symptoms.

Omicron is not a vaccine. The vaccine is the vaccine.

https://www.euro.who.int/en/health-topics/health-emergencies...