People having high levels of unsaturated fat had a third less risk of getting a heart attack. Studies have found that a diet consisting of unsaturated fats reduced cancer cells and tumours. Though meat from grain fed cows seems to have less fat, looks can be deceiving.
There is a problem with the proposition from this research. In Australia and New Zealand milking cows are fed mainly on pasture. However, people in these countries are almost as fat as US citizens and high blood pressure is just as bad. As a person ages milk consumption decreases. Australians do eat a lot of take away food. And these food establishments foister coke on you. When you order tea or coffee you can almost hear a sigh from those serving you. You see pained expressions on their faces as they search around for milk and cups hidden away under the counter. Some even opt out of the "chore" by asking older staff members to make it.
A campaign to make consumers buy grass-fed milk would be a waste of money. This type of milk would be more expensive anyway with separate processing and packaging requirements. It would be like the call for free-range eggs. Producers and sellers can be dishonest. Battery eggs are sold as free-range and buyers don't know the difference. The same thing would happen with "healthier" milk.