This just proves you don't have a lot of knowledge about food.

First of all, there are many studies that show that plant-based meat alternatives are healthier than their meat counterparts. Just because a food is processed doesn't mean it's unhealthy. Or are you under the impresssion your sausage and burger patty are health foods?

Second, just like with non-vegan foods, there is a variety of plant-based meat alternatives: Some companies include much healthier ingredients than others.

Finally, even if it weren't for my two first points, the main goal of replacing animal meat with plant-based meat is not health, but ethics and environmental concerns (but again, it's not unhealthier).