The memory is that these old factory/manufacturing jobs were high paying (middle class), secure, and accessible to people of low intellect, minimal education, and limited social grace. The proposed replacements "caregivers, retail workers and customer-service representatives" are significantly lower wage and also require more "EQ" that the working man of the prior generation didn't need. The voters these politicians…
The truth is that wages a worker can earn are bounded at the top by how much value they add. If they are paid more than the value they create they'll be fired (unless they're executives).
A manufacturing line can produce millions of dollars of value with a few dozen workers. This means if the workers organize properly and if they're not undermined by foreign competition then they can potentially capture a lot of value and have high incomes.
The "service" jobs that are replacing them add much less value. A caregiver can only work with one person at a time, and maybe six or eight in a workday. That guarantees the job will be low wage or not done at all.
Our economy used to produce jobs by the tens of millions where an average guy with average ability and a willingness to endure hard work and monotony could buy a house, raise a family, go on the annual vacation to Niagara Falls or the Grand Canyon, have his wife work as much or as little as she wants and eventually retire comfortably. The economy doesn't produce these jobs anymore.
Now we have jobs that are still well compensated but comparatively small in number and highly specialized or jobs that are not and can not provide wages to live the lives people used to have.