Blogs actually give you a perspective on the thoughts of a very limited number of early twenty-first century people who are generally rather narcissistic and unwilling to put in the effort to craft complex works of fiction or non-fiction, but instead produce quick off-the-cuff superficial responses to events affecting their personal lives. That scarcely covers the range of the human condition. Most readers of blogs live in a bubble in which they read blogs written in their own period by people like themselves to confirm their existing prejudices.
Not only are blogs unlikely to introduce you to ideas new to you, but also, because they are short, and generally badly or simplistically written, they do little to improve your ability to read, analyze, or comprehend complex issues. Thus major print works of fiction and nonfiction are still essential to those who want to develop deep knowledge and complex thninking.