Other countries have figured this out long ago. If you have to go to the hospital in these countries, finances and costs are a non-issue - the only thing on your mind will be your health and a speedy recovery.
Put another way, if this family does need the trauma unit for their child next month, will they hesitate? Which is worse for society?
Obviously there’s a balance to be struck (hypochondriacs), but I think we can collectively come up with a situation in which both the individuals get paid and the family isn’t being so financially burdened. False alarm or no.
There were people there anyway, an attending physician looked at the child, talked to the parents (all doctors want is your anamnesis!) determined that nothing to worry about, maybe keep them in observation, and that's it. There's not even a word about doing an Xray/CT or any kind of imaging to check for internal bleeding.
Probably the "activation" of the Trauma Unit is that when they called 911, the hospital booked them and was ready to receive them.