While it's a shame that we live in a lawsuit-happy society that is ruled by lawyers who decide what is safe, I do understand why Disney has continued to not allow guests into the front cab. They now know that they system is not perfect, and as someone else said, they were very lucky that guests were not also among the causalities that horrible day. I believe Disney cares about their CM's, but they will tend to take the safety of their guests even more seriously. While CM's are trained in the situations that could occur, the typical guest is not and is helpless in that position.
I'm sure riding in the cockpit of a commercial airplane would be magical, but they're not going to let me up there, especially after what we learned on 9-11. If you don't learn from your mistakes, you just continue to put others at risk.