They’re all departments of endless pointless jobs. Just hope that doesn’t include the safety side.
Fun fact, after the end of Soviet Union, a company created a clever excavator to basically scrape of layer of top soil and sand and extract the spilled oil from it for use in an area of Azerbaijan. When they got the contract, share price rocketed as they booked millions of barrels of reserves instantly. I saw that area when driving out to a rig. Trust me, recommend keeping a few rules around