The only thing stopping that right now is that that's pretty expensive at scale. The research about using AIs to "nudge" people, the research that AIs can far more accurately determine your tastes than currently-used profiling techniques, all that is already in place and it's obvious how to take the next steps.
Jury's still out on whether AI is actually going to be a net benefit to humanity, or if the AIs will be so firmly under the thumb of their owners that eventually the only rational thing to do will be to disregard everything that may have come from them because you can presumptively assume that everything coming from them is for the owner's benefit and not yours.
Considering the people in control of AI are effectively sociopaths with not much interest in anything other then self interest, chances that AI will be net gain for humanity in short term is super small. Its owners will use it the way they use their money and power in general.
Jury's still out on whether AI is actually going to be a net benefit to humanity, or if the AIs will be so firmly under the thumb of their owners that eventually the only rational thing to do will be to disregard everything that may have come from them because you can presumptively assume that everything coming from them is for the owner's benefit and not yours.