I think it's mostly projection on the part of IIMT there, he is wrong on that aspect but mostly right in the big picture. You have western nations and cultures that are turned to the sea and are natural colonizers, like Portugal, Spain, Holland and Britain, while the Chinese have had a very long tradition of being an ethnocentric and self-sufficient land power. If they had an ounce of colonialistic inclination, they would have long colonized Australia, NZ, the Philippines among other places that were easily accessible to them and where inhabited by very primitive tribes. Part of the reason they didn't set out to colonize these lands is that their population had historically been regulated by internal strife and massive natural disasters (mainly floods).
The Chinese are by and large fairly intelligent people due to their civilization having undergone 4,000+ years or natural selection due to high social mobility. Throughout their history there has been a decent level of upwards and downwards social mobility, where successful men married and had many offspring, while unsuccessful men didn't. This has been a phenomenon documented by western anthropologists. In parallel to this, you had a long established meritocratic system of state exam where a gifted working class pupil would rise to become a mandarin or administrator.