On alternative past scenarios (and the error most people make)

Yesterday a woman wrote a comment under my answer on Quora where I said that one can neither choose passion (if you already have passion, you have no choice and those who, like this lady, believe that it is still possible, don’t know what passion is), nor one can have regrets (if you still believe regrets are reasonable — I for one don’t, as most, or even all regrets are the product of our wishful thinking) after one did what was his or her passion for a while.