Science does not say that behavioural therapy works in 100% of cases. It seems you want to believe that it does. I have tried behavioural therapy, it is not right for me, it doesn’t work for me. I pursued different modalities that do work for me instead
Asserting that one modality must work for everyone is ascientific nonsense
It just sounds like classic depressed thinking to me. Every depressed and anxious person thinks they're the exception to being able to ne helped. Some are right but the odds are not in your favor on that one.