Earlier quoted context omitted.
Which diet is more healthy? Low carb and high fat? Or high carb and low fat? And when you add salt yourself without sugar, you generally don't get to the salt content of most of what you see from packaged foods or a restaurant.
I'm actually on a keto diet now, as it happens. I guess, if you're fat, low-carb is healthier? If you work out a lot, high-protein/high energy etc. It depends on aim/requirements, but I mean matched to personal metabolic health. There's another thing too: digestive health - requiring plenty fiber, not too much sugar, and not too much fat either..
But as a person whose family is prone to diabetes, I'm going to go light on sugar.