They prefer frying to stewing and frying, which is related to the invention and utilization of kitchen utensils. More importantly, frying is faster and does not require too many ingredients, indicating that their eating habits are mainly fast and heavy, and fewer people are willing to eat light and less oily things. But they can put a lot of spices, which can be complicated and can't be said that they won't eat. It's just that the average cooking level should not be as high as ours.
Potatoes are easy to grow, can completely adapt to the climate of most western countries, and are relatively healthy as a staple food. However, if it is not fried, it will not meet the normal demand, so it will be fried, which is also related to the intake direction. In modern times, the intake of oil has been much higher than the original amount, so the obesity rate in the west has also increased. But in ancient times, the difference in obesity rates between the two was not that great.
Now westerners still like fried potatoes and fried fish, mainly because they taste good, so they have not been eliminated by the times. There are many food choices now, but if you are too lazy to try it earlier, some westerners may still eat potatoes and fried fish as meals.