Depends, as you allude to pain is sometimes useful. In chronic cases its extremely debilitating and the treatment for pain is worse than the disease. For people with cancer, severe back injury and some of the other problems this could but huge.
Some people have problems where their brain registers pain but there isn’t an underlying cause.
I don’t think that’s what this new therapy is for. The article said this treatment was aimed at pain caused by nerve degeneration, such as in diabetes and certain bone cancers where the nerves are damaged. I don’t think it is for other causes such as most cancers or trauma. Still, my mom has diabetic nerve pain in her feet that doesn’t respond well to analgesics, so this might be good for her.