Deficineiron: I suspect it all traces back to those parts of the bylaws that were introduced with the combination of Vivendi Games and Activision, which imposed certain limits on what the CEO of ATVI could do to the Blizzard segment without prior written board approval. The internet echo chamber mutated that into some sort of wall isolating Blizzard.
Of course those parts of the bylaws are now gone, removed when Vivendi was bought out.