"Healthy" varies depending on who you ask. I am a firm believer in there being no "bad foods" so much as there are bad ingredients, and terrible portions. If you don't eat any carbs, you are really going to have trouble keeping exceedingly active over time. I'm not entirely sure how much I'd be able to jog or swim without any carbs at all in my diet. Probably not very much. Fresh pasta is delicious stuff, and it isn't "bad for you" if you really eat a serving size. As a hint, when you make pasta with a tomato-based sauce, the veggies should outnumber the pasta, at least in my opinion. Most people eat 2-3 servings of pasta at a sitting, and I've seen some working their way towards five.
My point with the section you quoted was that making it yourself is not that difficult, more healthy, and tastes way better.
Butter and flour aren't "good for you," either, nor is most cheese. I'm not advocating changing over to a diet of macaroni & cheese (even homemade). I'm just bewildered that people have such a hard time making even the most basic things for themselves.
Perhaps a better example would be soup. People chime and echo that "soup is good for you." Is it? Most canned soup is pretty awful stuff. Even the "low sodium" and "low fat" soups are a mess. Now, take some good chicken broth/stock, some fresh vegetables, a bit of leftover grilled or roast chicken, some fresh herbs and spices... and suddenly it's pretty good stuff.
I'm not a health nut, by the way, and neither are most of the people that live to be old and active. I just like wholesome, fresh foods and find it crazy that other people would choose processed stuff over fresh.
I am trying to be more healthy. I still eat carbs. I used to run a lot and plan to get back started doing that. Butter, as I understand, is quite healthy while margarine is poison. Since fats have twice the calories as carbs I don't think I'd have any problem running without carbs, though I know fat won't burn as fast. But when I run a lot running doesn't even get me breathing hard so I don't see it making much difference.
Omega 6 and 3 oils are important too. Brian Peskin's books recommend a ratio of 2 to 1 (iirc or is it 3) parent omega 6 to parent omega 3. But I think you need a lot more saturated fats than unsaturated. Here's a link to another source that recommends butter.
http://www.westonaprice.org/Principles-of-Healthy-Diets.html