Imo being a cured PWS means not stuttering anymore, regardless of the fact you still have troubles to speak to others or to a public. Everyone could have a lack of confidence when speaking but many PWS are scared of speaking mostly because of their stutter, that's the main problem in most cases. That's why i believe being a cured PWS means you don't stutter anymore, because others can be scared of speaking but they aren't scared because they stutter