The first option would also result in the weird situation that most South Africans (11 official languages), who use English in everyday life, would not count as bilingual because there’s still a bit of a difference to fully native speakers. My wife grew up with Sesotho, but started learning English from 1st grade on and all her classes in school and university have been in English. Her English is better than mine (5th grade, and all but English-classes in German), but worse than that of my USA or British friends.
born in a bilingual country / completely indifferent to native, educated speakers of the language
While we are on the topic, you wouldn’t normally use “indifferent” like that. A better word would be “indistinguishable”.