In one study of 50 Western American mothers and 48 Chinese immigrant mothers, almost 70% of the Western mothers said either that "stressing academic success is not good for children" or that "parents need to foster the idea that learning is fun." By contrast, roughly 0% of the Chinese mothers felt the same way.
What Chinese parents understand is that nothing is fun until you're good at it. To get good at anything you have to work, and children on their own never want to work, which is why it is crucial to override their preferences. This often requires fortitude on the part of the parents because the child will resist; things are always hardest at the beginning, which is where Western parents tend to give up.
Privately, the Western parents may worry that their child does not test well or have aptitude in the subject or that there is something wrong with the curriculum and possibly the whole school. If the child's grades do not improve, they may eventually schedule a meeting with the school principal to challenge the way the subject is being taught or to call into question the teacher's credentials.