Isaiah 43:1-3 has long been my go-to scripture. I didn’t realize how prevalent the attitudes you describe were until I examined my own feelings about depression. Having never experienced the type of depression you write about, down deep I believed anyone could simply will it away. But watching a close friend deal with it has taught me she would will it away if she could. But she couldn’t. Depression paralyzed her and my encouragement wasn’t always what she needed to hear. Sometimes I needed to just be there for her. And keep my mouth shut.
Right now my friend has broken the chains of depression, but the reality is, it will probably return.