The US and its allies believe that countering Iranian drones is cost-ineffective because they are widespread and very cheap.
As reported by Yeniavaz.com, The New York Times wrote about this.
"It costs more to shoot down a drone than to get it into the air. The cost-per-shot ratio is at best 10-to-1," Arthur Erickson, CEO and co-founder of Hylio, a drone manufacturer, told the newspaper.
The article notes that the cost of a single kamikaze drone from the Shahed family ranges from $20,000 to $50,000. However, the cost of a single shot from Patriot systems used to intercept UAVs exceeds $3 million.