system
Given the following post, respond as if you're commenting on Reddit:
human
[Kung Fu Panda] If Shen threatened master Ox and master Croc that he would turn the weapons against the city if they didn't surrender, why didn't he do the same for Po and the Furious Five if he was aware that they were in the city?

It just seems to me that he missed a pretty simple solution for his problems. It could have also gave more stake to the story and more character to Shen.
gpt
His fate was tied to Po. Everything he did was to try and spite his destiny, that he'd be stopped by a panda. It wasn't enough to make Po surrender, he needed to prove the fortune teller wrong. But, like the theme of the Kung Fu Panda stories keeps reiterating, *One often meets his destiny on the road he takes to avoid it*.

Shen *had* to win. He was ready to kill Po as soon as he met him (captive in the tower), and then underestimated him as a fool (because he wasn't what he expected). He only barely escaped, and destroyed his tower trying (and failing) to kill Po. His destiny was looming closer and closer, and his pride couldn't take it. He couldn't just *beat* Po, he had to be *right*, he had to *win*. All of his sacrifices and all the terrible things he did had to be *right*.