Do you, though? I see lots of numbers around hospitalizations, but how many (vaccinated) people hospitalized end up in the ICU?

Singapore does a great job of testing and the vaccination rate is >95% for the eligible population. Despite that, they have introduced restrictions due to ICU overload.

https://www.moh.gov.sg/covid-19/statistics

Look at "Proportion (%) of cases ever critically ill in ICU or died, by age and vaccination status"

Looking at the high risk group of 80+ year old (43% of all ICU cases and/or deaths), the numbers are: unvaccinated (24%), partially vaccinated (16%) and fully vaccinated (3.2%).

They don't define partially vaccinated (typically 14 days after 2nd dose). So clearly the vaccine reduces the risk of ICU/death, but the "truly" unvaccinated make up only 50% of ICU cases in that age group.

From all the local reporting the overwhelming majority of people in Czech ICU are not vaccinated. A few examples - listing from a hard-case ICU in Ostrava for a week in November:

https://mobile.twitter.com/VojtechGibis/status/1463608271378...

NEOČKOVÁN - not vaccinated OČKOVÁN - vaccinated

The last 5 patients are those that have been released from the unit in that week. The first two were move to less severe case ICU. The last three died...

One more: https://mobile.twitter.com/VojtechGibis/status/1465783542982...

Czech ICU occupancy - blue unvaccinated, orange vaccinated. And yes, we had several cases <30 years old and unfortunately even children on ICU.