Here's why:
* It's based on iambic pentameter: This rhythmic pattern (five pairs of unstressed/stressed syllables per line) was a staple of ancient Greek and Roman poetry.
* Shakespeare's use: Blank verse was popularized by William Shakespeare and became the dominant form of English dramatic poetry.
* Long tradition: It has been used by countless poets since then, from John Milton to Alfred Tennyson to Robert Frost.
Therefore, blank verse is far from being a new development. It's a classic poetic form with a rich history.