Why did Zhuge Liang say that burning vines as soldiers would lead a happy life?

Zhuge Liang's fire killed more than 30 thousand people, all of whom were able-bodied men. In the age of small population in ancient times, these 30 thousand people were the hope of a country, so Zhuge Liang said that burning rattan soldiers was fatal.

The battlefields in ancient China were all battlefields of cold weapons. All the people fought the war with real knives and guns. Life and death are rich in heaven. Success is the hero who wins honor for the family. Even if you don't succeed, you are also a generation of heroes who died in battle. So the ancients were very brave on the battlefield. Zhuge Liang had to use the strategy of burning in order to capture Meng Huo alive, but this tactic was unnecessary in the ancient battlefield because it was too vicious.

Once the fire burns, it will take a long time to put it out in the southern mountains, and it is difficult for people in the forests to have a chance to survive. At that time, Zhuge Liang burned more than 30 thousand Fujia soldiers. These people are brave soldiers who go in and out of the battlefield. As a result, they had no chance to die on the battlefield and could not fight the enemy. Finally, they died in the fire. These people can be said to be almost all men in a small country. Zhuge Liang appeased Meng Huo only to unify the south of Shu Han.

Moreover, the ancients were superstitious, and genocide like this was generally taboo for the ancients. If Zhuge Liang wasn't eager to subdue Meng Huo, he wouldn't have taken such a risky move, but it was precisely because he set fire to the rattan armor that Meng Huo was afraid when Zhuge Liang was fierce, so Meng Huo also surrendered to Shu Han, showing how tragic it was to burn the rattan armor.