Because the only thing that really matters is that the health system survives. It has never been about individuals. It’s not about you. Vaccines protect from hospitalization, reducing the massive stress forced upon hospitals and health professionals. When a hospital has to deal with a large influx of Covid patients they have to dedicate a lot of their resources (mostly humans), which eventually causes a complete bottleneck: all resources are dedicated to people dying from covid and other patients have to be rejected, lot of them dying.
It’s really not something you want in your country or state. See what happened to Italy, India, Brazil, or is currently happening in overseas French territories, it’s a horrible situation to be in.