In this era I am surprised there are still many people who think English is not so important, that not everyone needs to learn it. Of course, there are professions that do not need the use of English often, but that does not mean you can ignore the language. Because there will come a time in life, when you change jobs for example, that you will need it. It is not something you can learn in a day, a month or a year.
Foreign languages, English in particular, need to be learned over a long period of time. Honestly, if you wait until you need to use it to learn English, you will not be good at it right away and struggle at least to start with.
If someone strongly declares that English is not difficult and can be learned at any time, they have a narrow point of new. The levels of English between a person who is good at the language and someone who is not are completely different.
For the latter, it is extremely important to create a foundation by learning English early.
The normal way that every adult in Vietnam encounters English these days is through their children learning English. If the parents know some English, it will be easier to monitor, guide and orient their children, choose a suitable teacher and course for them, and help them learn faster.
English may not be necessary for many people in previous generations who already have a job and stable life, but it is a different story for today's youngsters.
English is now a door leading to various opportunities. Anyone who thinks it is unnecessary can wait and see if their children can compete with their peers later on.