I think it is indeed devastating that children could have complications related to the virus, as they might not be able to protect themselves. Equally devastating is the amount of senior citizens that can become very ill due to the virus as well. I truly feel for all the families that are fighting agains this.
But I really cannot get why a lot of people assume it would be devastating to Disney. I have said this before, but I think each one of us will have to take responsibility for visiting any place outside our homes. Be it the grocery store, the pharmacy, the doctor's office, the hospital. Again, no one is forcing people to visit. You just need to be comfortable with the risk profile. And we cannot think any company will be able to ensure their environment is 100% safe.
For instance, I practice a sport which requires me to sign waivers in case any harm is to come from the activity itself. I consider the risk low and happily sign the waivers away. Some people might have a different tolerance to that risk and think I am crazy.
The more obsession there is with pointing fingers at Disney for having them expose people to a potential virus contraction, the more restrictive potential measure will be. That is, the more people saying (and actually doing it) they will sue Disney for being exposed to the virus could potentially lead companies like Disney to have us sign waivers as well ahead of visiting their parks.