Solitaire is a great preparation for life. You lose, over and over again (in my experience, about six games in every seven). Often your access to the needed card has been closed off by a prior move and so you learn about burning your bridges. And in many of your games, you have the slowly dawning realization that you are trapped—simply going around in a circle, making no progress.

In the earliest digital versions of solitaire, there was no "Undo" command, quite a shock to those used to retrieving a real card from a pile. Undo was quickly added.

And the most recent versions have become even more humane. They have foresight and will usually tell you when you are hopelessly trapped, that there are no more moves you can make that will lead out of the maze. There are still occasions of endless loops-within-loops that the software doesn’t recognize, but usually it spares you the growing despair.

Humane solitaire might be useful for training physicians and climate researchers. Just when they get good at it, you take away the foresight feature. Next, you take away Undo.