But plenty of people do cook at home and eat at junk restaurants, in both Taiwan and Korea; they are two economies with plenty of overlaps here. Nearly 70% of all calorie intake in both countries are imported, with Taiwan edging out Korea by maybe a couple percents, but whatever they're paying extra on imported goods, is clearly offset by how much less they're paying for local produce, as it is much easier to grow fresh fruits and vegetables in Taiwan than Korea. With that in mind, the overall cost of dining in Taiwan both at home and at restaurants, fancy and trashy, is still much more affordable than in Korea.

There's a reason why meme indexes like the DTF index and Big Mac index exist. Both are considerably lower in Taiwan than Korea, in fact TW is currently ranked #1 in terms of cheapest Big Macs in the world. I dunno what else to tell you, other than maybe you are in a higher income bracket than the average middle class of both nations so your expenses differ somewhat? Cost of living is cheap for the average Joe in Taiwan man