That's a wrong view in my personal experience.So if you are young and have no existing health conditions, then the risk/reward ratio of taking an outdated vaccine, that really only truly protects you against hospitalisation anyway, just doesn't seem worth it. This risk/reward ratio is the exact reason the all knowing scientist/health professionals are not vaccinating young children. It's too much of an unknown (risk).
You'll never know how COVID-19 will affect you, but after by your own words "hospitalization only", I've got unilateral tinnitus and a bunch of other health problems (GERD, heartbeat issues), which thankfully subsided during a 3-month period, but tinnitus remained every little bit the same as after COVID-19. And my left ear is damaged and have HF hearing loss.
Also at my work, which have ~150 employees, during pre-vaccination period, three of my co-workers have been hit hard by COVID-19 (one left work because he can't work anymore because of lung problems.).
After vaccination (90% at my company, which I work for), nobody has been hit by hard COVID-19 (although many have had Delta variant of COVID-19).
I was 36 when COVID-19 hit me (sadly two-three months away from required vaccination age threshold). I had no other health problems before (especially hearing related).