the reduced speeds in construction zones are there, primarily, to protect the people who have to work there, and who should not have to be dismembered as a condition of their employment.
People who speed through active work zones who kill themselves are just enforcing Darwin’s law and cleaning out the shallow end of the gene pool.
Yes, construction speed limits are there primarily for the workers.
However there is enough heavy equipment movement, Jersey barriers and lane closure to warrant the slower speeds for traffic to protect everyone.
Unfortunately those who speed in construction zones usually do as much, or more, damage to others as they do to themselves.