Twofold
If she had woke & wandered then they are responsible for allowing that to happen. No one else to blame.
There is no putting this in any favourable light, unfortunately it is true. A poor decision was made that with hindsight contributed to Madeleine disappearing. Although I will say apportioning blame to either of Madeleine's parents does not forward any investigation and I also strongly suspect they accept their responsibility and fundamentally regret it. Always will.
Secondly if abduction from the apartment is exclude by W&W then they have to explain the open window, the raised shutter and the ever changing door angle, on all of which they have put such emphasis
Therefore the woke & wandered theory has to be played down and denied. All IMO, of course
Yes the statements regarding windows and shutters, bedroom and interior doors seem to be confused, however it has to be pointed out that these alone, or taken into context of the crime scene are not in anyway conducive to explaining what took place. I am more inclined to believe that controversy surrounding these was down to confused statements and jaded recollections.
With your concluding comment, I think that's an astute observation. Personally there is evidence to indicate that her parents were controlling the narrative because, let's assume for a moment, that they had nothing to do with this, they would want to promote the theory they believe in or is being investigated. Anytime the focus returns to them and they know it is a waste of time will be deeply frustrating for them.