Why would anyone in their right minds write a memoir?

IMG_20170926_182336 (3)It’s quite terrifying, I’ve discovered, writing a memoir, especially as I’m attempting to write it in the form of prose poetry. A concern is crossing a line in terms of family loyalty. How to accommodate their right to privacy while telling my own story? One way, of course, is to change almost all the names. I’m also keeping the dateline vague. Wish me luck!