The bottom line of the story is this man had invested a decade in a field in what I could at best describe autopilot - it didn't seem like he had and lost passion or was simply making a finance-driven decision.
At the end of the day this is pretty much what happened and to dress it up would hurt our ability to connect to the problem and think about it.
An alternative view of someone choosing to change career paths later in life is that you gain access to a different background than the other candidates in your pool. that may not be valuable in your case, but often it is. At the very least he's recognized a sunk cost and cut ties, which can be hard to do.
But I do think there's communication value at describing things sharply. "John has been affected by alcoholism" and "John has fucked up his life by drinking - his wife left and took the kids" can refer to the same event, and while the first phrasing is more pleasant and respectful - it is the second phrasing that drives home the severity of what's actually happening.