You raise several nutritional theories here.
Dietary Cholesterol / Blood Cholesterol - cholesterol restriction has been removed from dietary guidelines in the US, so people have taken that seriously.
Increased saturated fat is pretty well associated with LDL levels, which is associated with cardiovascular disease risk. Not sure that I've ever seen any contrary studies recently - I would be interested if you could link any you are aware of... I guess the questions I have seen are around carb intake and fat intake, but that's kind of a separate issue
Salt is definitely more questionable, but seems like if you are avoiding hyperprocessed foods, you are going to intake less salt, so maybe a non-issue...