Patently wrong. I am an underwriter for an insurance company; artifically inflating value is fraud. While the client may pay for it, the premiums they pay are miniscule in comparison to the amount a company pays out on a total loss.
I'll elaborate.
Let's assume you purchase a home for, $100,000 cash. You think it's worth more, so you "buy" additional coverage to $150,000. This is called either stated amount, or, agreed value, in which case the company has to AGREE to cover the item at the amount requested. Now, let's assume for a moment you can convince the company to use NEITHER of these terms and instead insure the home for replacement cost, and list it at $150,000.
If and when the home is a total loss, most companies have a clause that increases the total payout to account for inflation; in some cases as high as 150%. So let's assume you have a guy, like Trump, who knows someone in the industry, who agrees to insure the house for $150,000 instead of $100,000.
The house burns to the ground; the company will be stuck paying out in accordance with its contract; 150% of the $150,000; in other words, $225,000; if the client had insured the home at appraised value $100,000, the company would only pay out $150,000.
A $75,000 difference. Guess who pays for that? The rest of the insurance pool.
Artificially increasing the value of insured items -is- absolutely fraud. 100%. Saying otherwise is incorrect and outright false in the case of MOST americans.