There are more vaccinated people than not, and people with prior health conditions are more likely to be vaccinated so it's not surprising they would be represented in the ITU population.
Data is tricky, especially with something like this.
The UK data also shows that all age groups are proportionately far more likely to be admitted to an ICU bed if unvaccinated. I don't think the majority of under 40 ICU COVID admissions who were unvaccinated were unvaccinated because they were already expected to die soon.
The UK data also shows that all age groups are proportionately far more likely to be admitted to an ICU bed if unvaccinated. I don't think the majority of under 40s admitted to ICUs who were unvaccinated were unvaccinated because they were already expected to die soon.