That's not 100% true, but close. For many people it's true that this would be effectively a bad cold. But two things: 1) they will infect others, and 2) there are a lot of outstanding questions about long term effects of short term disease.
Those that get sick, which could be your parents, seems to become very sick and in demand of prolonged care. There are clear indications that brain injuries is part of that picture. Without health insurance, you are in really big trouble, and possibly stripped of the after care with possibly long term effects.
In what way is it “good” that you have a large population of silent spreaders? You should be very worried.
So unless the age of hospitalization goes down, it's a good sign.
This seems to be early researcher needing more confirmation, but see for example here: https://www.newsweek.com/coronavirus-antibodies-lost-10-wuha...