I've always considered myself to be "anxious", and used mental health techniques to manage my anxiety, including CBT. CBT is great! But FDS has provided mental health benefits that therapy was unable to offer me. Here's why.
Therapeutic modalities for anxiety are based on the idea that the world is safer than you imagine it to be. The idea is that you need to convince your brain, adrenal system, etc. that you are "safe".
FDS, and other strategy systems that are adjacent to radical feminism, are about acknowledging ways that the world is unsafe that we are shamed for recognizing. We're not crazy, it's not in our heads. The hazards are real. BUT! It also teaches us that we have power. It gives us a roadmap for how to deal with the risks and come out on top.
I think many women who get "blackpilled" end up with only half of that package. They acknowledge the reality that lots and lots of men want to take advantage of women. And, they acknowledge the reality that men collectively will scheme to take advantage of women collectively, always have, and always will. (Not every individual man, but men as a population.) But they are taught that we are helpless. We're not. Organized female power has always existed in some form alongside organized male power.
I think my anxiety was more persistent because my brain and body understood that I hadn't yet learned how to protect myself from the types of bad experiences I had had with men in the past. I would try to convince myself to not let the bad experiences control my present behavior, continue to put myself at risk of a repeat event, and then use therapeutic techniques to soothe the anxiety that would appear as a result. Now, I apply stricter vetting strategies in interactions with all men, and I'm more willing to assert myself in ways that might get me labeled a "bitch". My anxiety has gone way down. I think it's because my body understands that I can protect her now.