[array_key_first]

You absolutely need salt for a good burger, and just about any meat. Almost anything, really. Salt is not optional. Beef tastes less like beef without salt.

[Intermernet]

Beef tastes less like salted beef without salt. Saying anything else is literally wrong.

[array_key_first]

No, because salt is a flavor enhancer. That's what enhancement is. That's why putting a pinch of salt in hot coco works.