Which of those examples are actual food replacements instead of liquid candy blasted with vitamins?
Slimfast high protein is the only option I see online that doesn't include huge amounts of sugar, but a single 180 calorie shake also gives way too much vitamins and protein to be sane times 10, which is what you need to get a day's worth of calories from it.
Weight watchers shakes look like they have exactly the same issue as slimfast high protein, except with more sugar and more servings required.
So here you are crapping on the product, but you actually haven't pointed to a realistic replacement for it.