I don't understand this post. Salt doesn't mean sodium. NaCl and KCl are both salts, and this is a 50/50 blend with less sodium (Na) for the people who need/want that. Am I missing something?
How was that alluded to in the OP? Eating it isn't the same as injecting it. It's a normal ingredient in electrolyte drinks and rehydration salts. It's also prescribed for hypokalemia.
Also yes hyperkalemia is really effective at killing as is hypernatremia. This is not only known but also evolved around. Your body works pretty hard to ensure you don’t ingest so much of either ion that you develop these conditions.