I don't think that's very interesting. Personality disorders or mental health, those matter much more and are real problems for a lot of people.

Personality matters only because it allows health professionals to differentiate what is a problem from what is not.

It's not so hard to change behavior when mental health is not an obstacle or is not involved. Changing personality sounds like a nice luxury for people who don't have mental health problems or personality disorders

And even then, I don't really see the point of changing personality, since a personality is not a real problem, only personality disorders (the medical term) really are problems.

And then there are thought patterns that can be shaped by mental illness that stay even after symptoms go away, those might be changed with CBT.