Robots aren't inexhaustible. They break down a lot and are far more expensive to repair and maintain than a human being.
Fillpy the robot will not:
- need vacations
- go on maternity leave
- call in sick
- steal from work
- be rude to customers
- go to work hungover from drinking
- come in high/stoned at work
- sue you for X,Y,Z
- sexually harass colleagues
- go on strike
- start a union
While they're impressively good in each of the aforementioned three fields, they're still not the world-changing technology they were supposed to be, right? (At least, not by themselves. When a very powerful human ties themselves to a slop machine, believing the output to be real, this can change the world)
The main achievement, besides search which is a very useful application, has been in how effectively we can get real people to believe total bullshit.