If you observe very well in that case that happened for that guy to lose his BTC, you will discovered that the guy is part of this category of people who just heard that if you invest little money on BTC and hodl for long you will achieve huge amount of money without settle down to know how to write the seeds phrase in a secure please for future purpose.

 Sometimes, things like this happen for other people to learn their lesson so that they will be careful where they store their BTC and, if you use good wallet to store your BTC and you keep the seeds phrase in a safe place, you don't have anything to fear.