Is therapy a necessary part of bipolar2 treatment?

A recent post asked if meds were necessary, and the comments were 100% in agreement that they are absolutely required.

What about therapy? Is is necessary, or an optional component that is helpful for some people but not all?

I've been through about 5 therapists at this point, and they ranged from not helpful to actively harmful. I'm over it. Medication has helped me a lot the last 6 months, and made me think I don't need therapy.

Is it irresponsible and arrogant to think I don't need therapy?