“We’ve almost got some of their telecommunications cracked; the front end even runs on a laptop!” The Mac that sunk a thousand ships could have been merely clunky product placement, not a bafflingly stupid tech-on-film moment.
“Senator Amidala is in a coma. Even if she recovers, she will never be the same and may not live long.” But no… George had to have his god-damned funeral scene, even if it demanded Simone Biles levels of mental gymnastics to save Carrie Fisher’s most emotionally resonant moment from ROTJ, as well as one of the more intriguing OT lore dumps.
Bonus points if a scene was scripted or filmed and got cut.
Well, they could co-opt our brains in various ways.
That asinine stuff at an office? Maybe it’s work the computers weren’t good at.
Doing manual labor? Maybe it’s controlling some robot doing a real world analog.
Some unskippable ad that you passively thought about? Maybe it represented work being done.
Maybe it is intruding on “spare” brainpower and if the balance glitches in some weird way? Reset you with “just a dream”.
I think there’s enough room for a “wetware” computing explanation. However I could see it being more than audiences were really prepared to think through. I think your “we need the humans safely out of the way of harming us, but we don’t hate them and we’ll keep them alive and engaged in a safe way” probably would have worked well, but they wanted the AIs to be cartoonishly bad in the first movie, and that would have been “too nice”.