It's a shame, but it happens after every storm.
A few years ago, in a neighborhood where I no longer live, I noticed that many neighbors were having their home siding replaced.
Then, some guy knocked on my door, and said my house had "hail damage" and that he could show me the damage, and work with me and my insurance company to get new siding. I told him I had no damage, and to take a walk. He wasn't happy.
A few months later, the guy and his employees were all arrested. He was defrauding several insurance companies. He would take a screwdriver, and poke at the siding, showing the "damage" and the homeowners would agree and defraud their insurance.
Something similar happened to our friends in the San Fernando Valley after the Northridge earthquake. People came by wanting to assess “damage” to their house (they had none). The guy had official paperwork so they let him in. He noticed the hearth was cracked and he wanted to repair it using government money. They said that it had been cracked for a couple years, so refused the repairs and the money.
He couldn’t understand why someone wouldn’t want to help him scam the government. Like your guy, he wasn’t happy.