My town experienced a disaster a few years ago and volunteers responded with heavy equipment to help within an hour. FEMA took 3 days and there was nothing left to do. I'm not going to go as far as saying FEMA should just be disbanded, but stopping volunteers from helping after just reading the story you read? I'm not sure what that's supposed to achieve.
My post is phrased as a response to the post it is attached too, focusing on the questions about victims deserving a professional response and responders deserving pay and such.
I would be all for stopping volunteers from trying to do rescues (and coordination) if there is evidence that they don't really improve outcomes. For instance, in the article the author helps get information to the Coast Guard, but the better solution there is to make people more aware of the Coast Guard having call centers and to make sure those call centers have capacity, not to have random people passing info along.
Clean up and restoration, not so much, if people want to help with that, whatever.