Because the humans overestimate the upside, underestimate the downside, and are often too lazy to check the output.

There's power and prestige in money, too, not just the positions.

Hence the lawyers who got in trouble for outsourcing themselves to ChatGPT: https://www.reuters.com/legal/new-york-lawyers-sanctioned-us...

Or those t-shirts from a decade back: https://money.cnn.com/2013/06/24/smallbusiness/tshirt-busine...