He could tell his parents that all students cannot become doctor and for there are he can make a career out of English, History and Geography.
Career in English - You can become a professor by doing PhD in some famous Universities.
Career in History - You get in central and state government jobs after B.A in History.
Career in Geography - You can become a Geologist who just has to go and check at what depth water comes and they pay him Rs 5000-10,000 for one day.
I will ask him to give some examples of famous people who have made this a career. He should sit and talk to them that why do they need a job. They need it to earn money and settle in life so why doctor only why not lecturer or geologist. A doctor will have a hectic schedule he will have at any time if there is emergency. If a lecturer a specific time span. He can give attention to other matter that of home and children.