How do you know that's even possible? God knows how much computing resources got spent just to train the one currently deployed "variant"? Now I don't know if there is some cheap post processing trick that does it, but either way does not at all seem trivial.
And the problem isn't that "you" think you won't cause any harm. Even if that is assumed true, that's not a guarantee that everyone else is as disciplined about it. Which brings me to the biggest point, what even is "truth" in the first place. People strongly believe in total fabrications, or multiple groups say diametrically opposite reporting of some real event due to religion, nationalism, politics etc. Its a massive achievement they are even able to manage to output something that doesn't just "violently offend" people all over the world. Remember, retraining/fitting it to everyone seems to me not to be a trivial task if you think to reply to that point by saying the answer is to simply personalize it to each user.