I'll bite: Who is a wellbeing expert? What is the ground for calling some people wellbeing experts? How does one earn it? How general is their expertise? Would

I'll bite: Who is a wellbeing expert? What is the ground for calling some people wellbeing experts? How does one earn it? How general is their expertise? Would you trust your psychologist with everything they say? Or even a group of psychologists that align with some contemporary majority opinion? How often in the past did accepted "facts" change completely?