Many people don't ask for what they want

Many people ask for opinions when what they seek is agreement or simply acknowledgement.  I notice many posts, polls, and questions that ask for the reader's thoughts on the topic.  However, the individual posting isn't really concerned with the reader's viewpoint.  He or she wants people to agree with his or her views.  He or she wants confirmation that he or she is doing the right thing.  He or she is simply seeking to be acknowledged.  It seems odd to me to pose a question when you really don't want an answer.  It's different than asking a rhetorical question.  By posing a question, it's more socially acceptable for the individual to become emotional or even angry if the respondents don't react in the expected manner.  It's as if some people intentionally look for conflict.  I find this counter-productive in a social setting to facilitate communication.  Wouldn't clarity be the simpler path?