Susanna's intervention is useful. As the debate spreads and more people are looking on, then they see that no matter how mildly and reasonably someone expresses gender critical views, they will be attacked. Eventually some of the onlookers will think "hang on, these attacks don't seem to have any basis, they're just unhinged slurs".
Her approach has its place as does the much more assertive ones by people like Posie Parker. There are a number of different audiences amongst those uncertain about the gender identity ideology and they will respond to different messages presented in different ways.