> Do you think people are incapable of sticking to their beliefs when they’re faced with counterarguments?

Heh, there are two ways to take your point. So:

I hope most people are capable of discerning poor/invalid counterarguments and holding to their beliefs.

I hope most people are capable of being persuaded by valid counterarguments and changing their minds.

My point was that on the margins there are people who make the right choice for the wrong reasons: they are persuaded to a valid position by sub-standard arguments, or hold their valid position despite generally compelling arguments. And technology like this will (eventually) change that equation. Whoever the AI serves, their position, right or wrong, will be overweight in the public opinion because everyone gets exposed to the custom-made, specific-to-their-mental-susceptibilities arguments from sources they trust, because on other issues those sources agree with them. There are none so imprisoned as those who cannot see the cage. (not sure who said that first, can't be original with me)