I think the reality for any product that has >7,000 employees working on it is that some people's job is to prioritize growth at all costs, some people's job is to prioritize the effects of on vulnerable people, and the vast majority of them have other jobs to be doing. This sounds appropriate to me; not everybody can be worried about mental health at all times, and somebody needs to focus on growth.

There are plenty of examples that the mental health people aren't being completely steamrolled. Parental controls allow you to block Shorts for your kids. That doesn't sound like a "growth at all costs" mindset.