In my experience, lack of consensus is always due to people who have strong opinions and potentially a lot of knowledge in a general area, however the specifics/particulars of the problem are not known or understood by them, hence they are effectively “trying to solve the previous problem, not the current problem”. The metaphor often used is “they were fighting the old war” and I think that makes sense: people who get into high management positions think that they know everything, and they do, but about “old stuff”. New problems, or problems in a slightly different subarea come about and they are suddenly finding themselves unqualified, so they try to re-establish dominance through pulling rank.
Just my 2 cents