Likewise, with Gale, he made a horrible mistake when he overstepped Mystra's rules and went for the orb, but that doesn't mean he deserved to suffer from the debilitating and lethal consequences of it--or be told to blow up.
Personally, I think his horrible mistake was not being thorough enough in his research and safety precautions. If he'd known what the orb really was, he probably wouldn't have touched it - and he learned that lesson. He now prefers to let other people munch tadpoles first.
(Edit: Obviously he learned that lesson already without knowing what the Orb really is, but I love how annoyed he is with himself when he finds out the true nature of the thing.)
