Slight correction: you want a *job*. Whether some particular job "leaves", per se, is really neither here nor there. If another one (maybe even a better one?) "came", then all would be even-steven, no? But finding/getting another job can also require training on the part of the person (as you point out); it also may require looking outside of one's prior field (which is why I don't quite understand the myopic focus on "Manufacturing Jobs" per se... if someone loses a "Manufacturing Job", does their next job have to be another "Manufacturing Job"?). Obviously it's true that anytime any person loses their job due to whatever reason, it's bad for that person. The only thing that bothers me is how truly dumb platitudes about the jobs situation seem to infect Presidential (and other) politics. Sometimes I just can't resist sarcasm in response, sorry about that :)
They made the rules they play by.