IT means that the vaccines and boosters don't keep you out of the hospital.
No, it does not. You fail to understand the base rate fallacy.
The vaccines greatly reduce the likelihood of being hospitalized or dying. The percent of vaccinated people in the hospital cannot reveal that fact. You need to know the per-capita rate, and you need to compare vaccinated populations to unvaccinated one, in terms of age, comorbidities, and so on. Old people at risk for COVID tend to get vaccinated more than other groups. Even though that reduces their risk of being hospitalized, the risk remains higher than for other groups. Old people who do not get vaccinated are 14 times more likely to die. The boosters reduce mortality by a factor of 3.