Two-edged sword. I typically haven't used many either, not so much because I didn't want to, but because we were already built on something else and can't change it (practically speaking, insert "afford to" ... at least in management's eyes).
I've played with WP and Drupal, looked under the hood at Magento (scary) and some others, but I wouldn't call me anything close to a framework expert or even a framework "user" for the most part. I usually prefer to do things myself as well ... that may earn me the dreaded "cowboy" badge ... 🙁