Just re-read your comment and you're right, you didn't make a false dichotomy. But it is easy for a moron (like me) to take your comment and turn it into false dichotomy. Sorry about that.
I will say, though, that I really don't like assigning percentages because I think they fit the situation poorly.
In my opinion, the company should have done two discreet things: fire the guy and address why he was fired (see my comment to other responder for why they should address the firing). Assigning percentages to these to represent their respective importance is not very useful; they are both past the threshold of Very Important. Therefore, they should both get done.
'Swept under the rug', to me, sounds like doing close to 0%.