Safeguarding hard physical cash is something most everyone, old and young, technically literate or technically illiterate, poor or rich, intrinsically knows how to do. And when it is stolen or lost, there are viable approaches to pursue with favorable probabilities of a happy resolution: tell a police cop to see if they can catch the thief using detective work, you could try looking around if you think you might have misplaced it, etc.
With BTC on the other hand, ensuring your wallet isn't had by committed and technically proficient bad-actors or that your wealth isn't all erased in the blink of an eye with a hdd crash or a distressed acquaintance wiping your data away, you can't expect normal people to be up to the task of combatting all of this. And retrieving stolen BTCs from bad-actors living a continent away is a task that police cops are not up to doing or even the slightest bit capable of. You are a really smart guy kragen, I'm sure you won't forget your computer's password one day or have your wallet compromised, but someone like my mom or grandma would, and the thought that simple mistakes and viruses and computer illiteracy could and probably would be the thing that leaves someone's wealth irretrievably erased without much avenue of recourse saddens me, and makes me wish that people in our profession who understand this would stop encouraging its usage.
I come from a nation that ranks lower than Argentina in stability. My family went through this very dance of receiving money from abroad and having to go to WU to get it. The risk of a bad accident happening is infinitesimally small in that than with BTC.