> More highly skilled workers can end up in this situation, too
And the moment that happens, all those nice benefits go flying out the window and the SWE find themselves having to clock out when going to the toilet. Demand (and therefore the easy of replacement) is what makes the difference.
It seems like your explanation suggests that the pool of "suitable" would be larger, i.e., the job is less skilled. I think it is definitely true that less skilled workers have bad options, because, by definition, they are easily replaced.
More highly skilled workers can end up in this situation, too... it's just less automatic that they can be easily replaced. In a recession, or after structural changes that render many such workers redundant... sure.