unfortunately that was how things were done with royal daughters in the day. Alexandra who went to boarding school in ascot was the first female British Royal to attend boarding school. Even with Anne she was schooled by a governess for the first years of school, unlike her brothers, she was thirteen when sent to boarding school.
Shame, as with continental royals we see a difference. Beatrix and margrethe both had proper educations, public and boarding, and spent time at university. Not sure margrethe ever finished any university, she went to a few including Cambridge, the Sorbonne and London school of economics, but Beatrix has a law degree.
I think education needs to be made a higher importance for the heir as well as younger siblings now a days. See royals I. Asia and the Middle East and they have amazing education backgrounds. Even a future king of queen wouldn't suffer for having a good education base. Same goes for their spouse.
The only issue with an educated consort is their career. we have to remember these consorts will have to give up their own career and ambitions when they wed. It would have been easier years ago when most brudesmaid would have been looking to be a housewife anyways. But if you marry the heir, or even the sPate in most monarchies, being a riyal is your life. A woman would really have to love a man, to give up a career she was passionate about. Happens, see it with Letizia, maxima and Mathilde, but not easy. Kate is educated but didn't have a career to speak of. Compared to the wives of the hours of Kent and Gloucester. They are married to a professor and pediatrician. Would a doctor be willing yo give up ekeven years of education to cut ribbons and attend parties?pethaps, but it would not be easy to find.