I think CBT if used right can be a biblical approach, and its great you found a treatment that helped. With something so varying as mental health, i can see that as with some other health problems, it can at times be a trial and error approach to treatment, as some treatments work better with certain people. I have friends that taking pills has worked for and some it really has not helped, some found counselling helped them get through or overcome problems, while others like myself found it a bit patronising and pointless. For me it was mostly prayer and time that got me through a very dark period, but i know others who refused meds and counselling etc and sadly ended up killing themselves or making very serious attempts to.
That is why i offer prayer and support but then try and leave it to professionals when it comes to mental health. You just never know.
I'm with you until you want to "try and leave it to the professionals". A professional only means they have been educated in their field to include Christian counselors. That in no way means they are even going to be able to help or even care whether they do. I have seen enough so called professionals in the mental health and regular health fields to learn that for most of them helping people is not their primary motivation, but are instead motivated towards generating repeat customers.