nothing is so simple and cut and dry as saying that someone in need of help would simply say "help me".
(1) I didn't say that. You seem to be conflating "needs help" with "a cry for help". By your standard almost any behaviour could be called "a cry for help" and there's no way to say it's not.
(2) I suffer from depression myself. So do a lot of people. Most people deal with it without hurting others.