It's a possibility, but how many truck drivers does this emotional situation with the sister apply to? Not many specifically. I'm sure they all do miss their families, however.
The article says "out 10 days and back for a couple" but that vastly depends on what kind of trucking you do. My dad's current schedule, for example, has him out for 5 or 6 and in for 1 or 2 (in a good week; recently there's been a few where he's only been out for 3 or 4 days which is a huge strain on the finances), but in the past he's had some short haul routes where he was home every day just long enough to sleep and before that, when I was young, he did some long hauls where I sometimes didn't see him for a month or more.
For the long haulers, even if their sister didn't die, odds are something has happened that they haven't had a chance to deal with.
The real take away message from this, though, is just respect and not to get upset if a truck is slowing you down for a minute.