I've called out people in the past on works they seemed proud of. In this case, parent commenter explicitly acknowledges that their work had unintended consequences that they did not foresee. So i'm asking for critical lessons/insights they may have gained on the way.

Calling out is "hey you're doing such bullshit". "How do you feel that what you did had this consequence?" is opening a debate to share experiences, not "calling out".