there is more that goes into cars than just vehicle assembly, for example, stamping and casting plants (and yes, GM still stamps and casts it's own body compone

there is more that goes into cars than just vehicle assembly, for example, stamping and casting plants (and yes, GM still stamps and casts it's own body components) - its still highly repetitive motions - so while its better now, its still not an easy job, and will wear your body out.