67 y/o is not ancient these days, but having certain experiences in one’s life can age you, can wear you down inside very quickly.
Not everyone will open up to a psychologist or similar counselor. You know that counselor is only there because they’re getting paid. Some in emotional turmoil will embrace any opportunity to vent in a safe place, while others never do allow themselves to really open up. This ‘not opening up’ is how they have protected themselves from negative impacts in the past.
He had ptsd. Stress ages, weakens and kills people. Cmon.