Making up stories like these and pretending they are the norm is not effective, because they represent such a small percentage of Americans, and it is not a good idea to base across-the-board federal policies like the FMW on exceptional (relatively rare) cases.
Remember that when it comes to minimum wage, we are talking about 2.7% of working Americans. About half of those who make minimum wage are 24 or younger (nothing to sob about there, they're young, still trying to build up work experience). So the percentage of working Americans who are over 25 and making minimum wage is around 1.35% or so.
Naturally, some of those 1.35% of workers (who are 25+ and making FMW) are married to people who (presumably) make more than the minimum wage. Some have never been married and have no dependents. Some have mental illness, substance addiction histories, criminal histories, developmental disabilities, or other issues that have ultimately impacted their academic and professional trajectories such that no one should reasonably expect them to be making middle class salaries.
In short, we are already talking about a very small percentage of Americans as it is, and when you subtract away the people who don't actually fit the progressive storyline of the minimum wage-earning family of four going hungry and down on their luck, you realize these sad scenarios, while admittedly they do exist, are actually uncommon overall, and therefore not a smart concept on which to base an across-the-board policy like a federal wage floor.