I agree with that. Women are dong the 4B thing because nobody is helping them. They can—right now—only help themselves. But they CAN do this unilaterally and it's genuinely empowering. That aspect I love.
It also puts a fire under everyone else. How that turns out, I couldn't predict. But we don't need everyone. We need enough people and enough effective action to restore women's rights and to transform the culture from one that excuses or even promotes sexual abuse, to one that treats women with respect.