Why else would one create software, if not to do something that a human does/did?
A few off the top of my head:
- Video games
- Medical device firmware
- Synthesizers
- Detailed universe-scale physics simulations
- Mars rover control software
- The Linux kernel
To do new things no number of humans can do
To do things that a human could have done in theory, but did not do because it would have been too expensive.