I did that once and cost someone their job.

Back in the bad old days of 2009, the company I apprenticed at furloughed the secretary and made me enter in job tickets. We had a special relationship with one client and they used us like one would use a drop shipping company – they sent us their customer orders and we fulfilled them. It was low volume (per job), high frequency work. About 80% of our tickets originated from PDFs that always followed the same pattern. As my first serious foray into programming, I automated the ticket intake for just their tickets so I didn’t have to type them up manually. At the time, I did not realize reducing a 10 minute task to 10 seconds (repeated about 15 times a day) would mean they never brought her back to work full time.

I don’t feel that bad about it: In the 5 years there she’d never been given a raise, the healthcare plan was atrocious, and she found out she was pregnant during the furlough. However, she decided to look for another job, and found one as a secretary at a school just down the street from her house. It was a dramatic pay increase, much better benefits, and better job security.
I left a few months later, and a year or so after, the business folded.