[jkldotio]

I logged in just to downvote you as, extremely unfortunately, you are the top comment on this thread at the present moment. I don't think, for most cases in which it is not terminal, that you can say it's a case of physical suffering.

As someone has pointed out in another comment, a huge number of suicides come not from people who are terminally ill but from people who are just depressed. In those cases nothing you say in your comment actually applies. Those people are not "critically injured" they are just depressed, frequently they go on to live full and meaningful lives if they seek help.