Why is the only measure of success deaths and hospitalizations?

As a younger person it has been my observation that vaccinated folks are more likely to get break through cases 6+ months after vaccine / booster. Speaking for myself I got COVID almost exactly six months after being fully vaccinated.

These break thru cases, while not life threatening, are nonetheless NOT fun, may lead to long haul symptoms, and put others at risk.

I personally would like to see boosters available every 5 months for those who want it