I guess it could be a question of emphasis. Surely it would be to the advantage of Microsoft to give a greater impression of openness, clarity and helpfulness if they did highlight (particularly common) abuses and poor uses of various features especially if they offered explanations and alternative solutions.

Let's face it, when it isn't done the perpetrator of such implementations will often blame the tool (in this case SQL Server) instead of a misguided use of it i.e. "it can't be my that's wrong it must be [SQL Server/SSIS/SSRS/.NET/etc.] that's rubbish".