Often it's literally just that:

https://www.msn.com/en-us/money/other/ai-startup-backed-by-m...

It's still engineering. Even magic alien tech from outer space would end up with an interface layer to manage it :).

ETA: reminds me of biology, too. In life, it turns out the more simple some functional component looks like, the more stupidly overcomplicated it is if you look at it under microscope.