It is expected that a certain number of people will, at some point, cost the system way more than they have put in. Who covers those people? The other people paying premiums.
Insurance companies can’t invest all the money they receive in premiums, a certain amount must be kept in reserve in order to quickly pay out for claims and the types of investments they are allowed to make is limited and regulated.
Yet you claim to be disabled - you require no medical care in connection with that? And even if YOU have avoided accidents and expensive diseases, things like cancer, accidents, and other highly expensive problems occur in people of all ages. While on average maternity/child care are the most common expenses, they are NOT the “big money sucks” - the big money sucks are cancer, heart disease, diabetes, and severe trauma. All of those strike people of all ages, with trauma being more common in the young and the others more common in age but none of them respect either age or youth.
No, hon, you are NOT “invested” in the insurance system. Lose your insurance you are SOL. There is not a pool of premium-derived money sitting somewhere with your name on it. Most of what you paid in premiums (between 90% and 97%, depending on the company) has already been used to pay for claims. Some of those claims are yours, some belong to other people.
Actually, some of them aren’t - most Blue Cross Blue Shield companies, for example are not-for-profit. As they insure somewhere around 100 million people that means a substantial number of folks are getting their health insurance from a not-for-profit corporation.