I don't think it would end stigma but it might be recognisable to others who understand what the symbol means (like prisoners getting a little bird tattoo to show they've done time - bad example but the only one I can think of!).
Also,the first time I read about this it was adopted by people who had attempted suicide.
I quite like it that it could be a private reminder that life goes on, that phases come to a pause or an end, while new, connected phases will follow.