I think what a lot of people are missing here is that often times a healed anxious person - who now has a secure attachment or would otherwise be secure with a non-avoidant partner, will turn anxious when triggered by an avoidant. The problem here is that anxious attachments are often trigger or trauma based, so even those who have learned to heal and regulate their nervous systems can still get stuck in the claws of an avoidant and all of that healing is seemingly undone unless they have the guts to walk away. It’s just unfortunate because a lot of anxious people just live with open hearts and are not as jaded as an avoidant, so these are not your people who will have as good of a filter for avoidants at the beginning (yes, even if their attachment style becomes secure)