They absolutely do, particularly if you're getting most of your calories from them. If evidence-based medicine doesn't convince you, uh, hamburgers and supermarket milk tends to be processed.
Individual foods are—with some exceptions—neither bad for you nor good for you. A healthy diet can occasionally include doughnuts, and milkshakes. Your overall diet is what matters.
Messaging matters. When you tell people hamburgers and bacon and everything they love are bad, they stop listening, give up, or just eat some other junk that wasn’t prohibited. When you tell them some foods are good, they start buying into superfood marketing.
Diet is the only thing that matters. Lots of veggies are extremely useful because they add bulk without adding calories, and along with fresh fruits are great sources of fiber. Cheeseburgers can only come so often because they’re extremely calorie dense and send enormous reward signals to your brain.
Give people the tools they need to thrive, not just “don’t eat these specific bad foods, eat these specific good foods”.
Reading this chain of responses from the original is making my internal bullshit alarm (Brandolini's law) go "wee woo wee woo".
Not at all an expert, but from what I understood saturated fat isn't particularly good but it's not “no healthy level to consume” either (fortunately because you practically cannot avoid them).
I think you're confusing them with trans-insaturated fat (which I don't think are as bad as cigarettes either, but are still bad).