I have some considerable ability to comment on this one. Dead end jobs and all.
Started my “career” quite literally at the bottom. Janitorial work. Never had the chance to go to college, except for a couple of classes I took over the years at CCs.
I now earn at the 88th percentile for all US workers. Worked my way up and out and became an expert in my field.
I had a janitorial job early in my working life as well.