Gosh, why? From any outsider's perspective, this gives Google P0 much more credibility to show that they are operating on equal terms and not playing a game fav

Gosh, why? From any outsider's perspective, this gives Google P0 much more credibility to show that they are operating on equal terms and not playing a game favoring Google itself. This trust is the foundation of industry cooperation, otherwise Google P0 would be perceived as a weapon of Google focusing on attacking and disclosing bugs in other companies, most of which are their direct and top competitors.