It is relevant.
With a 4 year degree in many other fields you can get an entry level job in that particular field. Engineers, journalists, teachers, business degrees, can all get you a spot in a real world job in your field. Not so much so psychology. The 4-year degree is just a starting point usually.
Of course any field if you want to do research or teach you go for advanced degrees.
The other interesting thing is that so many psychologists themselves are seeing a psychologist for their own issues. Another unusual aspect of this field.
Can't argue that one. The number of doctors I know who went into medicine as the result of a personal or family illness/tragedy is also staggering, and I know a lot of docs.
Another interesting thing about this field is that the aspirational practitioner is seen (by others in the field) as equivalent to the professional practitioner. Compare this with the professions of medicine, law, accounting, and engineering.