The documentary did feed into some of the China-hype that's so prevalent at the moment: 'oh look at the Chinese, never noticed them before, look at how they're taking over the world there with their Kumon maths and violin lessons and 5 hours of homework'. China's been around for 5,000 years but somehow Western documentary makers are only noticing it now... there is too much hype about how different and strange China is.
IME, all cultures value education and hard work and tradition so Chinese culture is no different in that regard. All that's different is that China is a large country, a competitive economy with no safety net and also Chinese people living in the West are influenced heavily by the immigrant experience, which is usually one of hard graft. I watched a Storyville documentary by a Chinese film-maker about children in a Chinese school and the parents were perfectly normal, more relaxed and not a tiger mom in sight. In fact the children featured were quite indulged, as they were only children. They did work hard at school, of course, and had a lot of homework but were allowed to play as well and socialise. It wasn't as extreme as the 'tiger mom' stereotype.
50 years ago, a documentary about British kids at a public school would have shown them being forced to play rugby in the pouring rain, studying Latin and Greek for hours and following military-style discipline as they were toughened up for life. The only reason 'the West' is different now is because of the liberalism that developed after the 1960s. People are the same everywhere with the same goals for their children, I think, although they may have different ways of achieving those goals.