It's not so much the jobs themselves. A lot of the problem with factory work is poor management and worker mistreatment.
Why manufacturing is so attractive is the pay and mostly steady work. You're actually producing something as a manufacturer, something that can be sold, something that is worth a tangible value. Selling services doesn't produce that (except perhaps in the repair industry, where you take something broken and worthless and restore value to it). You also get steady shift workâproduction is not a time-sensitive industry; whether a product is made at 9 a.m. on a Tuesday or 7 p.m. on a Saturday doesn't change its value the way a service industry job's value does.
Our current service industry destroys families with low wages and emphasis on night and weekend work that deprives people of a social life.