Flexible means the AI will truely make its own decisions, not some refined specialized Chess master that can beat 99.99% of human population. Flexible means you give them a generic task description and they will figure out the rest itself without preprograming.
Stuff like, draw a nice new car design for me, design a new software management for me, please deal with this new random issue for me, and etc.
What makes huhman flexible, inventive, innovative, and a decent problem solver, also makes them unreliable, unpredictable, and unstable. If you look at the blue print of human body, they are basically like machine, but, their signals often get corrupted
and randomized. We either accomibate the noisy signal with less accuracy (mistakes) or we sparks new better solutions from processing these noisy signals. When we deal with noisy signal on computer, we went to the complete opposite route, bit correction.
Few mad scientists will attempt to build a AI as close to human as possible, but, they wouldn't be funded by rich croporate because error porne machine is not profitable.