@Nep For context, I would point to Hideyoshi, the backlash isn't something as simple as a nitpick if they are historically accurate. Its basically a new-money sort of situation at the least, the kuge still thought Hideyoshi as a baffoon (despite all his attempt at becoming "cultured", through sponsoring and mastering tea ceremony and dancing). At least Hideyoshi was a male samurai, Shizuko is even further behind given the period's misogynistic tendencies.
As for the "useless women", its not so much that they are "useless" but that they are so affluent and pretty that they "don't need to work", compared to peasant girls who could not afford to have their foot maimed. Basically, princesses and heiresses simply have their own charm of exclusivity. (for record, historically concepts of "beauty" include, chubbiness - eats well unlike peasants, white skin - never in the field thus never getting a tan, EXTREMELY long fingernails - no need to work therefore "can afford to maintain ten inch fingernails on every finger", feet binding - same as fingers, breast binding - could afford to hire wetnurses therefore don't need to nurse own children, asthmatic - either by harness or by medical condition, etc.)