Re: Did you read the filing?
"If what is claimed is true"
That is, of course, the question. Is what they claim actually true? As the article notes, the filing doesn't actually say who this Chief Medical Officer actually is. Maybe they did tell Apple and they weren't considered a reputable institution in their own right. Maybe they didn't tell Apple at all. Presumably at some point we will find out, because at this point it certainly doesn't sound like enough information to support a lawsuit.
If nothing else, it's notable that a Chief Physician during the space race would likely be at least in their 90s by now, and therefore unlikely to be actively working much either on medical or app-related things. Without further information it looks suspiciously like trying to stick a famous name on something without them actually having much involvement.