tofu and non-vegetarian dishes

Discussion on Youtube opened my eyes to something: the US, tofu is largely considered an alternative to meat, something used by vegetarians and vegans. But in Asia, according to the comments, it's often complementary to meat. Most famous example in the US might be ma po tofu, recipes for which are often "2 parts tofu, 1 part ground pork." At Philly's SE Asian market, one of the skewers I bought was a mix of fish cake and tofu. And just now, I had some miso noodle soup, that was pork slices, meatball, fried egg, and tofu (not much tofu, less than anything else).

Whether Asian cooks are motivated more by "meat is expensive, stretch with tofu" or "tofu is good for you", I don't know. Today's tofu didn't seem abundant enough to count as stretching...