Not saying the suit is right or wrong, but lets look at the situation. You have to provide for your family and lets say you are low on money due to unforeseen medical expenses. What do you do? Being the provider, you try and recoup the medical costs by suing disney, thus providing a better life for your family in the process.
I'm not saying Disney is at fault, but it is probably in their best interest to settle as this incident did occur on property. It's good PR for the company. All I'm saying is look at both sides of the story. If it's just someone going after money, then that is sad. But at some point, you do what you have to do.