Stability Matters as Much as the Diagnosis

The condition itself is only part of the story when insurers assess pre-existing medical issues. While going through https://www.globelink.eu/pre-e....xisting-medical-cond I noticed the page stresses that a condition must generally be stable and well controlled for the last 12 months, which feels like one of the most important practical details. Do you think most travellers pay enough attention to the stability requirement before assuming they are covered?