I think the theory of accidental death and parental involvement has been well and truly discarded and I think the first competent investigation to do so was Rebelo's.
Two other investigations working independently of each other have also discarded the original flawed theory. So that makes it three against one.
It stands to reason these professionals are investigating Madeleine McCann's abduction based on all the accurate evidence they have to hand, some of which has come in post the archiving of the case.
So walked and wandered seems to have been put aside, accidental death also ... what does that leave?
Why is it a flawed theory, merely on your say so ?
As a reminder yet again, the crime as unknown.
There are the indications of the dogs, neither confirmed nor contradicted by forensics.
The professionals as you call them have found nothing as regards abduction.
For if believe they have, you are dreaming.
The abduction is a belief/theory for some and without which, can lead in one clear direction.