My gut had me wanting to say the same thing, but looking at the age ranges, this actually seems reasonable and in line with how many other countries operate. By 6 years old, students in the US are in first grade, for example. Kindergarten a year or two prior as well, which is also compulsory in some states.
Religion has very flawed ideas regarding community, however. It always results in a hierarchical structure and works to exclude those who don’t abide by its values.
It is possible to be a good, selfless person and be religious, but I don’t think it’s possible to have religion without enabling power-grabbing, insular practices too.