ok, so a professional can do it with a permit & regulation?
Is that what makes it Not-Reckless, regulation & rules & proving you know the rules to the permit issuing agency?
Do you think they just hand out permits for fireworks out of vending machines? You don't think there is paperwork involved and that the company presenting the fireworks show has taken the necessary steps in making sure that their guidelines are met or exceeded thus to satisfy their insurance company for that particular firework event? You don't think the person responsible for the event also has some kind of insurance just in case they do not handle their crowd or give the fireworks company the wrong information? This is all general knowledge stuff Kid.
You think you can light off fireworks without having millions of dollars in liability insurance backing you up??? No, you cannot, this is why they don't hand you the permit until they see the insurance. How much liability insurance is backing you up when you unload rounds on a RC airplane? You think 2.5 million. HA! In your dreams.
So what happens if a guy takes the rules, and obeys them without a permit
Nothing until something happens and he or she is trying desperately seeking someone to bail them out from losing their money and property for doing something stupid because they didn't have any insurance to cover them.