Chinese/East Asian cultures do not put much store in being naturally gifted or good at things - they believe that talent is not necessary, and that success will come with enough work.
I think Moomin has the answer here, or at least a large part of it. There is often an assumption in British culture that you're either clever or you're not. You can do maths or you can't. You're either academic or you're not. And so on.
"Hothousing" and "pushing" are frowned upon. It is generally thought that if you're naturally "bright" and do a reasonable amount of work, you will do well anyway.
Most Asian families I know tend to emphasise ability and talent much less. For them, it's all about hard work and effort. They don't put limits on their expectations based on perceptions of a child's ability. The assumption is that anyone can do really well if they put the work in.
It's a growth mindset as opposed to a fixed mindset. I think this is a massive difference between cultures.