I use the Adobe version of this in Photoshop every day and I assumed that Adobe solved this the same way, but used professionals to cut out the subjects from the backgrounds then fed both versions into their AI.

Since they added it a year or so ago it has been game-changing. I'm cutting out portraits every day and having a magical tool that cuts out the subject with perfect hair cut out with a single click is sci-fi.

Here's a demo of Photoshop's tool:

https://www.youtube.com/watch?v=SNVJN6PKeGQ

(the other magical Photoshop tool is the one that removes reflections from windows, which is even more insane when you reverse it and tell it you only want the reflection and not what's on the other side of the glass)