Blame it on the cabin crew, they have to come to work unfit.
Spoke to one who explained once you call unfit enough times you are requested to come in for a chat which explains the following...
1. You may not call sick for the next two months otherwise you advance to stage two of the threat and intimidation process.
2. You may only see the doctors at CX city.
Nice to see the HK CAD endorses these actions, perhaps the doctors at CX should get an understanding that should there be an incident they will be specifically named as certifying a person safe to be responsible for passenger safety.
CX city doctor: "What are you doing?"
Cabin crew: "I'm recording this conversation so should I have an incident I can explain that you said I was only eligible for one days sickness".