The definition of health goes way beyond 'the absence of disease'. Even the World Health Organization uses a broader definition.
It is also managing a chronic disease successfully to minimize complications and recurrences. Healthy people are able to utilize whatever resources are available to them to live their lives on their own terms. A paraplegic who goes to work every day, supports their family and enjoys being alive is healthy.
A brilliant professor of mine defines health as functional competence. Over time, that definition has held up under scrutiny.