Mapo tofu doesn't seem like a good counterexample since the pork component is as important as the tofu to the dish. Granted there are veg versions using mushrooms as an alternative.
Pretty much every asian tofu dish in its authentic form includes meat. Tofu was never seen as a meat replacement in its countries of origin. However, if you think about it, mixing tofu and meat as protein sources does reduce the overconsumption of meat. My Japanese friend who came to visit recently was shocked by the large steaks and whole chickens that you could buy here. There they usually eat very small slivers of meat with other stuff. So, yeah, still probably helpful to the environment and probably healthier considering humans are not herbivores.