im not sure it will help to see your wife as crying wolf. thats a sign of a breakdown in your trust of her.
generally speaking, her concerns are all very real to her, and/or they are overexpressed and over the top, but still very real for her.
largely, our partners need a little extra hand holding, and what tends to satisfy the most is listening with empathy (
https://bpdfamily.com/content/listen-with-empathy) and making them feel heard, that there concerns matter to us, as opposed to shutting them out or dismissing them, which breaks things down on both sides.
is it a good sign that your wife wants to start marriage counseling? yes and no. its a good sign that she wants to make it work and get on the same page. its also an indication that she feels thats not the case, and does not feel heard.