There should be a certain amount of truth in that comment, except the people with those jobs largely voted for Hillary Clinton.   The median household income for Trump voters was US $ 78,000.

Where did Trump out-perform expectations?

1.   In the whitetest rural counties with lowest education - and that was a very different effect.  That had nothing to do with jobs, and an awful lot to do with the ceaseless eight year drum-beat of racial polarisation driven by the Republican Party.

2.  Among black voters who chose to stay home rather than voting for Hillary Clinton.  Trump lost this demographic badly, but not nearly as badly as he would have against President Obama.