This also saves you from the stress of trying to hide your problems. That alone is hugely valuable. And even if you had guessed wrong, imagine what a hell the next few years could have been in that case.

It might even be possible for your boss to shift you into low stress roles. Done at this early stage instead of waiting until it is absolutely necessary could buy you and the company ten productive years you would not have had otherwise.

And should the local paper someday decide to do one of those periodic "valiant PWP" writeups, make your employer sound like Mother Teresa (after clearing it with them, of course) to return the favor and encourage others.