I suppose better than the job they would do if they didn't have therapy.

I'm not sure if T who never did therapy would always be less competent than one who did. Think of a T who needed 10+years of therapy--could mean they have a truckload of issues.

One of my Ts who did his own therapy had trouble owning his stuff and would always blame me no matter what. That was one thing I couldn't get past, caused tremendous problems.