Two laptops is easier than you’d think if you have the right bag.
My work lap is so locked down I cannot do anything personal on it, so when I go into the office I always carry two laptops, and the personal one is an old thick heavy dinosaur; it’s got to be at least five pounds. However, with a good bag that has a (non-padded) belt and sternum strap, it is not difficult. The belt carries most of the load and my shoulders don’t hurt; they hardly feel anything.
I deliberately park in the farthest spot at the other side of campus (about a half mile, and up four flights in the garage) to get in exercise steps with the heavy pack.
It’s good exercise but I absolutely need a belt and sternum pack to do it. Wouldn’t dream of trying that with only shoulder straps.
Tell that to airport check-in staff haha. A laptop and charger are around 3kg and there's only so much clothing I can take out of my suitcase and wear to make it passed check-in.
But I hear you. It's annoying that I can't reuse perfectly good hardware, but it's fine - we make do.
The added scrutiny at some border crossings can be problematic too. Explaining to the inspectors at the Turkey/Bulgaria border why I had two phones and two laptops (and dissuading them of the suspicion that I was smuggling electronics to friends/family) through language barriers was a pain.