Damaging thought patterns are just a part of the problem for many people. Those thought patterns are part and parcel of the landscape of personal relationships you have in your life, and talking to someone outside of that paradigm can give you the opportunity to think differently.

A decent therapist is going to come to the table with tools and skills to share, because they have training and experience. They're not (hopefully) just some random "other person." They'll also be better equipped to recognize the symptoms of specific clinical health conditions, and address those conditions accordingly, whether that means adjusting what kinds of coping skills they recommend to you, or referring you to a psychiatrist for appropriate medication to be used alongside therapy.

I was raised in an area where if you have a problem: deal with it.

"Deal with it." Okay, how? If you don't know how, and you get stuck in a feedback loop, a therapist can help you break out of that loop. Could you perhaps do that on your own? Maybe, and if you can, it may take longer and be much more difficult. There is no shame in getting guidance through the difficult parts of life from people who have expertise in providing such guidance.