I remember reading that WHO definition around the time I started nursing in 1985, and still believe it today. Perhaps because I'm a woman, not a man, like your statement, Northerner?!? Why not say person?!?
I do believe that even with type 1 diabetes, I can still have "social, psychological and physical wellbeing" - admittedly not complete in all aspects at all times, but striving for happiness, fitness and absence of complications is a good status for me. A partner, cat, ducks etc all help, and will be better once my knee injury is operated on and I can run again - it's been 4.5 months now.