True Dat!
also chefs add way more butter and salt to things, way way more than you would at home, sure is tasty.. but not good day in day out long term.
Not if they're any good. If the foods done right, saltiest thing you should have is the crust on a prime rib.
Most butter should be in a sauce, which should be used conservatively.
Breakfast is another matter, but that's more of a problem with American food culture than anything else. Too much hash and eggs, not enough fruit and toast and yogurt.