The reality is that you need to have some things for what you are doing, so you have to carry them. If we didn't need anything, we woudldn't have to carry anything.
So, if you need heavier clothes to stay warm, or to resist brush tearing, or to keep the sun, wind, or rain off of you, or if you need pockets which add an ounce or three, then you have to carry them. Just like if you need a heavier sleeping bag, or a heavier winter coat, or whatever.
The manufacturers' tags and handles on toothbrushes, as examples, are things which are NOT needed for function, and that is why they get cut off.
There is a difference between useful weight, and just plain dead weight. If we didn't need anything, we could hike naked.