It's called a metaphor, son.
I'm very, very grateful that no one has given the inevitable misandrist bullshit of;
"STFU! U NEVER WERE PREGNUNT EVA! IT"S TEH WIMMYNS ROIGT 2 CHOOSE, STUPID PENIS MAN! DIE DIE DIE DIE! U GO GET PREGGERS AND THEN FEEL, EVIL CATHYLICK MISOGYNIST COOOOW!"
Or the fundie unempathy of
"BURN EBIL WOMEN! YOU HAVE CHOSEN DEATH, AND SATAN WILL ASSRAPE U FR ALL ETERNITY! YOU EVIL SINNING SATANIC BITCH, GO SERVE YOUR NEAREST MAN AND ROT IN HELL! LOLZORZ!"
Also used

, why does it make someone less human if he/she cannot survive outside of a specific environment? Are people in comas non human? People like Stephen Hawking with Motor Neurone Disease? People with terminal cancer?