This effect may exist, but it's dominated by the wider UK population in which vaccination rates for over 80s are 95% and vaccination rates for under 40s closer to 60%, and care homes and immunosuppressed people were priority targets for vaccination. There are people who are considered too sick to be vaccinated, but I don't think they feature significantly in COVID ICU admissions, not least because ICU isn't likely to save them for the same reason they weren't vaccinated
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 40 ICU COVID admissions who were unvaccinated were unvaccinated because they were already expected to die soon.