They can become the de-facto documentation for a solution. Look at MS. Several solutions lately can only be found in its engineers' blogs rather than the official documentation. Standard maintenance issues shouldn't be in a blog. Lately I have spent several afternoons looking for things in TechNet only to find the solutions in some engineer's blog. That is ridiculous. If the blog covers releases and news from a group great but it shouldn't be anything more and if Apple wants to ensure that the message being conveyed is uniform and not use blogs so much the better.
Obviously, middle/upper management at Apple is adverse to social apps. Maybe it's because they don't see a revenue stream that can be generated from it. Maybe it's also because the money needed to support it is too great to justify it. (Facebook - Have they made any money? Don't know since it's a privately held firm, but most think not. Also, its valuation, which most analysts agree, is based on an over-inflated amount paid by MS for a tiny share of the firm.) Maybe it's because they don't want to expose Apple to the liability of PII (personally identifying information) being exposed by a mistake in the coding. "...many businesses see this increasing load of legislation as excessive, an unnecessary expense, and a barrier to progress." - Wikipedia. There are numerous reasons for not going down the social app path and if one of them is that it won't produce net income, thanks Apple.
Democracy : a system of government by the whole population or all the eligible members of a state, typically through elected representatives.Socialism : a political and economic theory of social organization that advocates that the means of production, distribution, and exchange should be owned or regulated by the community as a whole.Totalitarianism : of or relating to a system of government that is centralized and dictatorial and requires complete subservience to the state.