I can confirm (at least in my experience + the experience of others I know who suffer from serious clinical depression) this is not how (serious) depression works.

I sincerely doubt it would make any difference, largely because of how you feel about life + yourself (it would require an acceptance of capability of doing such things) + the point of trying to help such a horrid world. I think the more immediate consideration of those people finding your body, etc. will be more effective as that's something undeniable and forces you to consider others in a non-fanciful way.