Ernie didn't ask anything further about Hogwarts. He understood completely why so many had no desire to return, and heard many of their stories at Battlescars. He had his own stories, too, but he also had his own set of reasons to return when he had to repeat his last year - one of which had been to ensure that the good memories outnumbered the bad ones, and that his time at Hogwarts end on a good note rather than a disastrous one.
"Research is important work," he said, hoping he sounded encouraging. "And you're right, so many of those who can see them don't like them, especially now that there are so many who can. That means that those who do like them, who care enough about them to help preserve them, they're more important than ever, don't you think?"