My friend’s mother was vaccinated. She still got Covid and ended up in the hospital for several days.
My brother and sister in law were vaccinated and both still got Covid. Neither of them became seriously ill, but they did manage to spread it to other people.
That seems to be the common experience for the few vaccinated people who get COVID and are bad enough to go to the hospital (total of 4,641 for the whole country as of July 26th): they go in for a few days and come out just fine.
Contrast this with the more common experience for unvaccinated people who frequently go into the hospital for weeks at a time and as many as half end up in the ICU. I pinged the docs who can elaborate on their experience, but suffice it to say that the overwhelming data is that at every stage along the way (catching it, getting any symptoms, getting symptoms severe enough to become hospitalized in the first place, staying hospitalized, ICU admission, and death), vaccination drastically reduces the risks and improves the experience.