Here’s my 2-cent on this, which is based just on personal encounters with several people in my life.
— Mahi wrote:
“Yet I am not unhappy unless ofcourse strong mental or physical vedanta arise.”
I assume you meant “vedana”, and they WILL arise.
I have met several people who took on a gung-ho attitude toward life, asserting: “I can take on the ups and downs of life.” The problem was that they made this statement when they were young and things were going “their way”. This attitude goes away when they are faced with strong mental or physical afflictions; in some cases, they come suddenly (viparinama), in others, they come due to aging and declining.
What we’ve learned in Buddha Dhamma is that this can be stopped from FUTURE arising, and that is real happiness, which is not as illusory as you think if you have experienced some niramisa sukha. There are several posts on niramisa sukha here.
Best,
Lang