There are so many underlying changes to the established relationship between Labor and Capital in the US that would be a necessary part of keeping jobs here that it would effectively make us a completely different country. For example -- suppose one could snap one's fingers and "bring back" millions of manufacturing jobs. What would lead one to conclude those would be the kind of "good jobs" everyone is envisioning?…
In contrast, many people will never be good riveters. They lack the strength, coordination, and stamina to do the job. Similarly, many people cannot be plumbers or electricians. Those are jobs that require intelligence and skill.