IELTS writing test

The topic is: Some experts believe that it is better for children to begin learning a foreign language at primary school rather than secondary school. Do the advantages of this outweigh the disadvantages?

My essay:

As our world becomes more and more globalized, learning a foreign language has been a staggeringly popular trend for years. However, there is also a controversial problem which has existed for years with this trend - whether learning a foreign language at primary school is better than secondary school? In my view, learning a foreign language at primary school is better.
Some people may argue that there is a disadvantage for children at primary school to learn a foreign language. They believe that learning a foreign language will be too difficult for the extremely young children at primary school. What’s more , they affirm that the chief goal for primary school should be to develop the children’s personalities and cultivate their temperament, but not to put too much burden on children by teaching them a foreign language.
However, despite the argument of some people who believe that it may be a disadvantage to learn foreign language at primary school, it is my personal belief that it may actually be a huge benefit for children to learn a foreign language when they are in primary school. First of all, it is widely believed that younger children can absorb knowledge more efficiently and faster than older people. Young children have great curiosity and good memory, it is actually easier for them to learn a new language. Furthermore, nowadays students at secondary schools have more and more pressure, for example in China, the students at secondary schools have to learn 9 subjects, homework and examinations from 9 subjects would be undoubtedly a great pressure and burden for middle school students. In this case, starting to learn a foreign language earlier at primary school will diminish their burden of studying at middle school, since they already have a basic knowledge of the foreign language if they have learned it at primary school.
After weighing the advantages and disadvantage, I reaffirm that there will be more advantages for children to start learning foreign language at primary school since younger children always have a greater potential.