And survival.
I don't agree with Google on returning to the office (at all, irrespective of COVID), but frankly at this point, almost anything that improves vaccine rates is fine with me. The sooner we're all vaccinated, the sooner we can return to normal life.
"Given that therapeutics (vaccines and antibody-based therapies) target mainly the SARS-CoV-2 spike protein, the selection pressures that favour the emergence of new variants carrying immune escape mutations generated in chronic infections24,25,26 will be similar to those selecting for mutations that allow reinfections within the wider population27,28,29. Therefore, sequencing of viruses associated with prolonged infections will provide useful information on mutations that could contribute to increased transmissibility or escape from vaccine-mediated immunity."
The difference is that the smallpox vaccine prevented infection of the vaccinated. That's not the case for existing SARS-CoV-2 vaccines. https://www.verywellhealth.com/covid-19-vaccines-and-sterili... gives an approachable overview of the difference.
Smallpox was eradicated. The likelihood of the same happening to SARS-CoV-2 is lower. At least, it would be the first example of a respiratory infection being eliminated. Influenza hasn't been eradicated and it does continue to evolve.
More broadly, the idea of "immune escape" is hardly something I can lay claim to. You can read about it in existing literature.