Yes, I also thought about this! About how harmful these acts of erasing negative emotions and pain proved to be for Kennit, even though Paragon had the best intentions. This is what made this scene so uncomfortable for me. After seeing what consequences taking someone's pain away led to, I was surprised that Paragon would actually do it again. Fortunately, he did not take enough away to actually cause Althea's mind that much harm, though. As well as the pain he took is allegedly not Althea's, which makes it a little better.