"there are those fortunate few who have, as you say, won the "genetic intelligence lottery" and sail through school and exams such as this with little to no eff

"there are those fortunate few who have, as you say, won the "genetic intelligence lottery" and sail through school and exams such as this with little to no effort" Is that just genetics? What about these kids' family lives? How about the interests kindled in them when they were young? How did their teachers treat them, and was there something in their experience in school, with tutors or parents which ignited a love for that subject? Did these kids' friends and family also value their learning? How much encouragement did they get? We can't assume that kids who take the same exams differ in nothing except their genes.