Depends if you believe stats out of South Africa that say around 90% of those who acquired Omicron and needed hospitalisation were unvaccinated. I think experts and data shows that you can still get COVID if vaccinated so in Australia where 74% of all Australians are double-vaxxed and 88% over 16 that you'd expect on law of averages more vaxxed than unvaxxed will get Omicron strain.
