Thanks for the feedback.  But still according to the game manual:
the good doctor needs all the help he can get! Additional staff, special diagnostics and therapy equipment, etc... The effect of the Health& Recovery center is quite straightforward: the higher the level, the quicker the healing.
So a straightforward reading of this means that a level 3 center has to be quicker than a level 2 center.  Which has to be quicker than a level 1 center.  Which has to be quicker than not having one at all.   Even in an unlucky scenario, a player shouldn't be out more than 6 days then?  And that's not even factoring in the supposed healing effect of a mid to high level doctor.   
I don't get why BuzzerBeater insists on making everything as unpleasant & disappointing as possible.   Especially with the game hemorrhaging users over the years.  Even take something I never use & don't care about like arena expansion.   
BuzzerBeater: "I know we told you construction will take 14 days, but it will really take 20 days.  Isn't that fun?"
Most normal people:   "Not really.  Bye."