I went to high school in China, and the Math problems in the US from the same level are literal jokes to us. At the end of the semester, my teacher doesn't have anything else planned for the last class, so just for fun he would find these problems and share with the class :"Now let's look at what American students in your age are dealing with". I remember all of the problems are so dumb that the whole class would had a good laugh reading through them.

At that time I thought the whole Math education in the US is a joke, until I came here for graduate school and realized how brutally challenging the Math is in higher educations.

My 2 cents is that the majority demographics in the US don't give a damn about Math, or any kind of formal education. Most people, even the uneducated, are living a comfortable enough life, so there is no such thing for the next generation to dream of "changing their lives" by pursuing better education. As a result, these type of education are only reserved by the elite. While in a lot of developing countries, education is the only way for a normal people to not end up being extremely poor for the rest of his/her lives.