That's because the production of meat has changed since the Industrial Revolution. More and more meat is being processed with other meats that we forgotten what the true taste of some meats are. Same with dairy, there are growth hormones and other bad stuff processed in milk, yogurt, cheese, etc. that it's rare to find any dairy and meat products that don't have any hormones and other additives in them.
inb4 you end up calling me out saying that I'm wrong.