Yeah, attractive parents are likely to produce attractive children.
But whenever I see a tall strapping athletic Chad, and he has a sister, the sister is also tall strapping and athletic. Women like that are usually not ugly, but those qualities aren't really seen as attractive in women.
If Taylor Swift and Travis Kelce get married and have babies, their kids will probably also be tall strapping and athletic. Kelce is massive of course, and Taylor Swift is 5'11".