I suffered from severe, complex P.T.S.D, for many years, and am still undergoing treatment, and would agree there are benefits to having had this experience. This is not to say for a moment that the shocking circumstances that led to my condition were something I would have wished for myself, or anyone else, not all. However, given they did, and nothing can change this, it is my personal philosophy to make the best of any situation I may find myself in, including the excruciating condition that is P.T.S.D. If I had not done, so then possibly I may still be held in its power, and that would be unbearable.
The benefits I found are many and varied. They include a deep inner awareness of my own inner determination and courage, which I know I can draw on to help me cope with other possible adversities: a deep sense of gratitude for all the positives in my life, including friends and family who supported me throughout: a sense of life as absurd: the career change I created for myself, through which I am able to help others struggling as I once was: the new friends I made along the way: my ability to restrain myself from judging others: my satisfying sense of self empowerment in overcoming my condition:---- I cold go on and on!
I do not wish for a moment to undermine or criticize others who may not share my view. I do, however, wish them all the very best in their own recovery towards health and happiness, the best revenge of all against the trauma that may have precipitated their disorder.