And to be fair, almost none of these stories are “walking out on their life”. They are stories of moving to a new city, taking a new job, or starting some other generally fairly well planned adventure.
I’ve done this a bunch of times (lived in five cities and two countries in a five year stretch, at one point. However, this is not “walking out one day and starting over”. This is just a change of scenery, and it shouldn’t be shocking that getting out of a rut is a positive thing.