As someone who recently started a goals Mastermind group on steemit, I can understand why people don't like to tell others what they are working on. It can help motivate you but italso take you off course from your target.
With my goals group, I am trying to create an environment for people to share their goals and support each other. I believe sharing your goals can help hold you accountable as long as you stay on target with what you need to accomplish.
Creating weekly check-ins helps with this, but it's an experiment and I will see how it works and adjust it as needed.