It's complicated. On one hand you don't want to foster mental health issues by constantly reinforcing to people that their weight is wrong and bad. On the other hand, you probably don't want to excuse a physiologically unhealthy condition by calling it "healthy".
I don't have an answer. I was fit until I hit university and now I'm struggling with my weight constantly. I'm committed to trying. Losing weight. Getting in a healthy habit. Relapsing. Dozens of times in a decade. But what I don't ever want to do is declare that I'm just healthy at any size and therefore throw in the towel.
The grim reaper doesn't give a crap what I think healthy means.