Yes, really.
His encyclicals are part of the teaching of your church.
You need to learn more about the Church before we rely on your expertise. This may help you: Is Every Encyclical Infallible
Whether you consider them infallible or not they are a part of the teaching of your church. Even the article you linked me to said that. The truth is catholics have no more unity on issues than protestants. All one has to do is look at catholic postings on free republic to see that.