I agree. I've called out writers for saying that journaling helped cure their mental illness, but this trend is far from gone.
It's toxic + it makes it harder for the people who are suffering to deal with it. They start believing things are their fault, even when mostly it's not in their control.
Also, to most people, mental health = depression. They write from the ignorance of not being able to comprehend what schizophrenia, deperrsonalization, or other severe mental illnesses are.