I instinctively read labels after bieng low carb for a handful of years, even though we are allowing carbs now, I want to know. Sugars are what I look for the most now...added sugars. I dont care about sodium and wont digress on that subject.
The two label examples you showed gave me no problem, although I wonder why a person needs to know the values on dry plain uncooked pasta. I hate the labels on smaller packages that list everything in sort of a sentence or paragraph form. That spray oil can is lying. It says 4 grams of carbs in one gram of product. The serving size is .25 grams. That's 1 gram per serving size, not zero. And, where do I get a timer that will tell me 1/4 second?
I did discover some interesting things with labels and those "insignificant amounts". Manufacturers are clever, they list serving sizes in some cases that are ridiculously small. I noticed on a jar of garlic chili sauce or Sambal the serving size is 1/4 tsp and the carbs were zero. I have never in my life only used a 1/4 tsp. I contacted the manufacturer and was told if a value such as carbs was less than a gram, they could label it as zero. I finally pressed them enough that they sent me the lab test results which are done in 100 gram samples. Turned out 1/4 tsp had, I'll say for discussion .8 grams carbs which is 3.2 carbs per tsp.. A much more normal serving size. People on the low carb web site freaked out when I discovered this same issue on other foods. Some people just look at the label, see a low value and dont even scrutinize the serving size and think the whole container can be eaten at once with zero carbs!
I broke a few hearts when I told the community that garlic and onion powder was about 1.75 carbs per tsp. Again, the labels are usually 1/4 tsp serving size and say zero or less than one carb. I dont think I have any recipes that use just 1/4 tsp, if I do, there arent many. People thought all spices were carb free until I broke that little nugget. It may seem insignificant, but you cant get to and stay in Keto much above 25 grams carbs a day (actual ketosis). A gram or two here and there can make a difference, especially when it's hidden.
And there's when labels are flat out wrong. For years the low carb community had been enjoying Eden's black soy beans thinking they were 2 grams net carbs (carbs-fiber) per half cup serving, then suddenly the company revised its nute label and they were 5 net grams per serving, 2.5X the carbs the old label told you.
Ya neva know...your mileage may vary!