Care to explain how is it better for "national security" that some of Google's division have to be sold/spun off into different companies? What is exactly the

Care to explain how is it better for "national security" that some of Google's division have to be sold/spun off into different companies? What is exactly the threat of YouTube becoming an independent company again, e.g.? The only thing I see is a loss for Google in revenue and in YouTube in the "quality" of their ads. None of this has any implication on national security.