The betrayal theme in Lwanda Magere — what does it teach us today?

The central lesson of the Lwanda Magere story seems to be about the dangers of sharing your vulnerabilities with those you don't fully trust. His Nandi wife discovered his weakness and reported it to her people. In our modern context, what can we learn from this? Is it a warning about inter-ethnic marriages (which would be problematic), or is it more broadly about trust, intimacy, and the risks of vulnerability? I'd love to hear different perspectives.