has anyone noticed how pretty much all the characters are an only child?

well except for hansel and gretel, dr baleine (before his brother died and is now a zombie), james (before his twin brother died) and granny (before her brothers died) so basically the ones who arent ou werent, their siblings are all dead with the exception of hansel and gretel. MDR anyways my point is that i've noticed that a large majority of the cast are implied to be an only child like regina, snow, emma, henry (both of them), belle, greg, archie, and rumple. i'm not ranting mind toi just something i've noticed lol