Never nitpick over realism with your GM.

Unless you enjoy your wounds being infected with gangrene, rather than healing with a long rest.

Transcript

Chewbacca: We climb a tree and swing on a liana to land on top of a chicken walker.
R2-D2: How is there a liana? This is a temperate forest.
Chewbacca: It's an alien temperate forest. There could be lianas.
C-3PO: Or snakes. It'll be more fun if you swing on a snake.
Chewbacca: Don't give—
GM: Oooh. Okay, it's a snake.
Chewbacca: <sigh>
GM: Save versus Poison.
R2-D2: You mean Venom. Unless he's hanging on with his teeth.
GM: Poison covers Venom too.
R2-D2: That's totally unrealistic.
R2-D2: It's like using a save versus Wand/Staff/Rod against an amulet.