How good is group insurance?

I would think my new dental insurance company from group policy that would not be as

profitable as other customers. In the last two years, every year I went over to check up with all basic works done and the bill was really high as close to a thousand at least. As I needed to see one specialist in the middle of year, the bill was also closed to the same amount but for one person only—they usually charged not the same total for insurance policy holders.  I am lucky to have a group policy to take care our bills. If I were to be fired as a customer (in fact, every three or five years after the group agreement expired, it will change another new insurance firm with new contract), I would just get another insurance company and pay more or less in new group policy. Good insurance in dental (yearly at least), critical illness (once enough) and long-term health care (e.g., when 65 to100 or over) are very important to personal health. No plan, no gain.