It’d be great if a burger-a-day diet was healthy. Don’t get me wrong—it’s not the worst. You’ve got protein in there and hopefully some veggies on top (and on the side) , and even some fiber from the roll (you used whole grain, right?).
Unfortunately, study after study shows that meat as a protein source just isn’t that healthy. It’s far better to get that necessary protein from plants. And yes, that association is a correlation, not a causation. There are some legitimate reasons that plant-based protein sources like beans are a healthier alternative to bacon. The researchers aren’t saying you can’t or shouldn’t indulge in a thick Delmonico or a flame-grilled cheeseburger. Rather that you should enjoy them in moderation. Generally, research shows that less animal meat is better than more, in terms of long term health. You don’t have to love tofu, either (it’s not the best plant-based protein anyway), as long as you strive to eat more of your protein from the ground and less from animals.