I've watched harmful practices done in religion's name get genuinely questioned and eventually changed because someone was brave enough to publicly challenge them, and that kind of open criticism feels like an essential part of any belief system staying honest and humane over time.
Sociologists studying interfaith relations have noted high-profile public criticism of religion by prominent atheist commentators can sometimes measurably harden believers' defensiveness rather than open genuine dialogue, according to some survey-based studies on religious identity under public criticism, making the actual social effect more mixed than a simple net positive or negative.