I theorized that parents think that wasa is rare because it is different from a normal reimu.
Mwommie, Maicha too fwood...Yufuu~n Reimyu ish an amajing missh pwinchessh!?
Cyuche!?As expected of Reimu's little one!
Taking it easy more than anything!Now! After eating mister food, let's do mister poo-poo!Yunyun
Little one is gobble-gobbling skillfully Reimyu'sh! Gwobbwe-gwobbwe time ish shtarting!
Mwommie look
Reimyu'sh doing gwobblwe gwobble eajy right?
Hwa-hwa hwappinessh!