I'm not an architect, but I have stayed at a Holiday Inn.
The easiest way to think about an element being "structural" or not is is to consider what can happen if you remove that element - will the roof/wall collapse on top of you or not. If the answer is no, the roof/wall will not fall down, it's not "Structural" or "Load Bearing" If the roof/wall can fall down on if you remove it, it is "structural" or "load bearing".
So, using your example, if you were to remove the drywall and furring strips from that cement block wall, will the wall and ceiling be in danger of collapse? If it is, then it was structural. If not, then it wasn't structural.
The Architects and Civil Engineers that I have known, do not consider drywall or furring strips to "structural" when designing a building. I'm going with their consensus on this matter.