Are seed oils unhealthy? Not from what I can tell.
A professional nutritionist speaks truth to dummies.
I cannot find convincing data that seed oils are any worse for health than any other high-calorie food, and the evidence for their benefits as compared to animal fats seems strong and consistent. Getting them out of the food supply could help reduce calorie intake, but only if they are not replaced by other fats. Using seed oils is healthier than using more saturated fats.