That’s why Quirrel calls it a curse. It lead the entire clan down a path of inbreeding! Unintentional consequences are unintentional.
Perhaps — but in canon, Voldemort himself is not a pureblood. For that matter, his mother was not exactly raised to know how to have healthy relationships.
Riddle was born out of the near-final collapse of the bloodline. Grandparents were awful because of over 500 years of insularity and intermarriage. Mother whammies cute boy as escape tactic / because she’s just seriously fucked up. But because his mother conceived him with someone not from the family, he ends up the first scion in, well, most likely centuries to be born with good health. Physically, anyway.
Perhaps — but in canon, Voldemort himself is not a pureblood. For that matter, his mother was not exactly raised to know how to have healthy relationships.
Riddle was born out of the near-final collapse of the bloodline. Grandparents were awful because of over 500 years of insularity and intermarriage. Mother whammies cute boy as escape tactic / because she’s just seriously fucked up. But because his mother conceived him with someone not from the family, he ends up the first scion in, well, most likely centuries to be born with good health. Physically, anyway.