I care about weight. A lot. Because I travel.
People on HN like to say a particular laptop is "light enough." Sure, if that's all your carrying. But if you have a bag or briefcase full of other things like documents, every ounce counts.
Even classified documents can be shipped. There's really no reason I can imagine for anyone to be hand-carrying paper documents in the passenger compartment of an airplane in 2018, outside of a diplomatic pouch. And in that case, the laptop probably has to be disposable anyway.
Um, some of us still use (gasp) paper notebooks and pens. Imagine that! (I'll stop using them when you give me something with comparable power consumption and handwriting latency).
Besides that, in my bag you'll find a Fuji X100 camera, a Polaroid Snap, a (yes, paper) passport, a wallet, a couple of chargers, a cell phone, some pens, allergy pills, etc.
All of that has weight.
As for shipping - one point of bringing something on a plane is that you can use it on the plane.
Anyway, the point is - weight matters. There are things other than the laptop that a lot of people carry when traveling - be it personal or business travel.