parent lottery; luck of the draw with one's parents
Slang term likening the circumstances of one's birth to a random gacha pull; used to express that one cannot choose their parents and that life prospects are heavily influenced by them.
See also: ガチャ
Quite a few young people feel they lost the parent lottery.
It's unfair that your life is decided by the parent lottery.
Compound of 親 (parent) and ガチャ (gacha, from 'gachapon', a random capsule toy). The term emerged in internet slang to describe the uncontrollable randomness of one's family background.