CBT therapy is like so many things. It takes time and effort -- both in short supply when you work for a living. And if you work, have kids, and perhaps other obligations -- forget it. You might as well drink more wine at night and watch more TV.
I have been seeing a CBT therapist for like 3 years now. She gives me all these assignments but I either don't do them at all or I barely scratch the surface. Why? Because if I did the CBT stuff I would not have time to do much else. No grit to do it left at the end of the day.
I read Kurt Vonnegut. It helps to feel less alone.