Aren't all those people saying the Chinese dynasties didn't invade because there was nothing to eat in the Korean Peninsula actually Chinese?

‌Large-scale expeditions during the reign of Emperor Wu of Han - Gojoseon was destroyed, but they couldn't touch Buyeo and others.
Four expeditions by the Sui Dynasty that staked the nation's fate - Hundreds of thousands of troops evaporated.
Three expeditions by the Tang Dynasty that staked the nation's fate - They were defeated twice in those attempts and barely managed to destroy Goguryeo.
However, they were defeated by Silla.
To say they invaded like that but "intentionally" didn't conquer the land...
It's because it was impossible to conquer, yet they pretend they chose not to.
Even after that, there is history where the Jurchens suffered a crushing defeat at the Battle of Gwiju,
and the Jin Dynasty tried to avoid fighting Goryeo as much as possible.