I did construction very briefly (“briefly” because the company owner quit paying me after a while); companies cut corners every possible place they can, because any safety measures cost time or productivity. Even doing things properly costs time and money that they don’t want to spend. Construction is competitive, so they’re bidding as low as possible, and promising unrealistic delivery times, and then turning around and expecting their workers to make those deadlines and costs.
You can’t fix this without stringent oversight, and criminal prosecution for the owners that are refusing to give workers the correct tools, and follow safety protocols.