What happens if you choose Zoe instead of Mia?
Herein, can you cure both Mia and Zoe?
After defeating Jack for the last time in the boat house, you'll have a tough decision to make. With only one serum syringe left, you can choose to cure either Zoe or Mia. By saving her, the two will leave on the boat.
Keeping this in consideration, can you save Zoe in Resident Evil 7?
RESIDENT EVIL 7 biohazard / BIOHAZARD 7 resident evil -Spoiler Warning- I saved Zoe. Greatest buzzkill in video game history. It's as if the developers gave you the "option" for no reason other than to have two endings - which would help replayability. Otherwise, it's completely pointless.
You only saw Zoe die if you picked to save her which is non canon. If you pick to save Mia you do not see Zoe die which is the real ending.