The stairway leading to the patio doors was lit and could be seen from the roadway; the front entrance was in total shadow and hidden by trees.
Therefore I think the front of the apartment block was the path of least resistance. Particularly for burglars skilled in gaining entry into premises in seconds, as we have seen thanks to you, it takes only seconds to raise the bedroom shutter.
I see your thinking and either your pick or my pick would be choice 1 and 2. If I was a house breaker, and none of you can prove I am, I would be more inclined to go for the patio doors, not only for their notorious vulnerability, but because there's loads of stuff to obscure the view (the parapet wall, relatively dimly lit, foliage, not directly overlooked, scope to escape by jumping down). If I were to try the front door I would be looking to put my shoulder to it or take a pane of glass out, both of which would have me in the full glare of the car park and road and would make a racket.
I think we can both agree, however, that only a fool would first consider the shuttered window, which is sort of my point.