You can make an awesome burger pattie with beef, onion, garlic, a touch of finely chopped jalapeno and some herbs and spices etc. You don't need to add salt.
Yes, and I can make a vegan burger from lentils, onion, garlic and a touch of finely chopped jalapino, herbs etc.
The comparison here is shop-bought burgers or those you would buy in a burger restaurant, which WILL have salt and likely more than a Beyond burger.
Maybe awesome to you, but many people will find that exact same construction more flavorful if salt is added
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.
You absolutely need salt for a good burger. It is fundamental seasoning in every savoury dish at every restaurant (fast or fine) for a reason.