Unlike us now, because the pig industry is relatively developed, pigs sell better, but in ancient times, because the environment was particularly good, there were more grasslands and the place was relatively empty, so there were more cattle at that time, and the cattle industry was also relatively developed at that time. So cattle were relatively cheap, and cattle were one of the main production tools at that time.
Unlike some of the high technologies we have now, mainly raising pigs, pork is particularly cheap and beef is expensive. At that time, beef was cheaper, because the cows were killed and sold directly when they were old, but beef was delicious and there was no fat, so beef was more popular at that time, and pork was something that some nobles ate.
So there is still a big difference between ancient times and our present. From this perspective, the difference is already great. Liangshan heroes are really strong. Maybe this is because they eat beef for a reason, because eating more beef will really make their bones stronger, because there is no fat in it, and if they grow, they are all muscles. So some people who like fitness like to eat beef.