the appendix and gallbladder are non-vital organs but they still perform useful functions.

unchecked population growth is indeed a problem, what impact do you suppose it will have on the population when people keep living longer and longer, and a few of them are essentially undying?

in your comment, are you meaning to speak metaphorically or am I reading into it too much. the symbolic reading of your words suggests that certain people might have the status of a gallbladder. did you mean to imply that?

The organs remark was bonus snark, but yes: we will have to address unchecked population growth sooner or later, because lifespans will – should – continue to rise as well anyway, thanks to advances in medicine and hygiene, unless something goes terribly wrong in some area.