Deveining is mostly for aesthetics and peace of mind. It’s like making your bed. Not strictly necessary for survival, but it makes the whole experience nicer.
If you’re serving shrimp to picky eaters? Definitely devein. If it’s just you and a bag of frozen shrimp for a Tuesday night? Go ahead and live dangerously.
And if you accidentally eat a whole undeveined shrimp? Take a deep breath. You’ll be fine. Just don’t tell your dinner guests. Some secrets are best kept under the blanket of garlic butter.