Why does the body even have a freeze reaction?

Like when you're in danger and you get an adrenaline rush, there's the "fight or flight," but there's also freeze. Why would that be an option? What good does freezing do in almost any immediately dangerous situation?

I have that reaction, and I want to un-learn it. I thought maybe I would naturally since something bad already happened once, and freezing didn't help really. That didn't work though because today something bad almost happened again, and I still just froze. I didn't even try to fight—at least I tried somewhat the first time...

It didn't matter this time because someone else was there and got me out of the situation, but if they hadn't been there then it could have gone very badly. Freezing is a stupid reaction, it doesn't help anything, and it shouldn't be an option. Why is it an option?

Why does the body even have a freeze reaction?
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