Vaccines save lives. Vaccines prevent serious illness for those who weren't at risk of dying.
Countries where teens aged 12+ are now all fully vaccinated, are seeing less cases amongst that age group, less school disruptions, less cases overall.
My 16 year old brother currently has Covid, in the form of a mild cold. Our vaccinated mother has only lost her sense of smell. Our Covid-denier father was put on oxygen last week in the hospital. He's now home but can't stand for longer than 20 minutes before having to take a nap again.
The two teens from Covid-denier families they all caught it from - ages 15 and 13 - were in bed for one week and are still feeling pretty weak. These were two healthy, active and strong teens. Their parents didn't allow them to stay home when they were ill, instead dragged them to friends' houses even when the girls said they wanted to rest. They still won't vaccinate themselves or the kids.
Yes, vaccines have risks. Catching Covid is far riskier, for any age group.