It's less than that for people with so called asymptomatic infections. The vast majority of people have had covid my now, and it wasn't much worse than a cold or flu.

In a naive population covid is far deadlier than the flu, let alone the common cold. During a Delta wave in NSW, Australia case hospitalisation rate peaked at 14%.

And at least in Australia the vast majority of cases of covid happened after people where vaccinated, so on a personal experience level that's why most didn't have a severe sickness from it.

You actually believe that without question? Most people didn't have a severe reaction to it even before the vaccines. Only very old and very unhealthy people did.

What happens when old sick people fill up hospitals?

Where did that happen? In many countries they got sent out to care homes.