It was my understanding that Loghain and his party,including Hawes being found traitors, morons and being disgraced and defeated was public knowledge. The same goes with with the news that he was offered the chance to join the Wardens.
"Public knowledge" doesn't mean what you think it does in a medieval society. Imagine if all the news you heard were relayed to you entirely through innocent smalltalk with others who had only heard it through innocent smalltalk with others who had only heard it through innocent smalltalk with someone who might have heard the equivalent of a town crier say something about something while they were busy getting on with their day, none of whom knew or cared anything about politics.
No print, no fact-checking, nothing at all to make things clear or filter out the misinformation of braggarts and idiots and outright propaganda in the mind of the average peasant who would know nothing about the workings of upper society except that they're a bunch of ****s always making trouble for everyone.
Now consider that Loghain, the celebrated national hero uniquely loved by peasants for his humble origins and his heroism saving them all from the dirty Orlesians, has spent an entire year campaigning to ruin the Grey Wardens' image everywhere in the country.
What is it specifically about the ending that convinces you that you're the epic hero to Ferelden's people? People in the know are well aware of what you've done, and what Loghain has done, but those are an absolutely miniscule percentage. The rest are just cheering because they're alive.
Let's be realistic, they will talk about the warden just for the simple fact that he/she is the protagonist or they won't talk about it at all.
That's an interesting idea of "being realistic" you have there.