Let's emphasize this once again: "happy education" had always been a lie the upper class used to fool ordinary people. Putting everything else aside, just look at Yukino Yukinoshita...
As the younger daughter, with Haruno—the eldest daughter and an almost perfect older sister—standing before her as an exemplary model, Yukino Yukinoshita's chances of inheriting the Yukinoshita Family were only a tiny bit higher than Kaguya Shinomiya's chances of inheriting the Shinomiya Family.
After all, Kaguya Shinomiya had three older brothers, so the Shinomiya Family had no shortage of heirs. The Yukinoshita Family, on the other hand, only had Haruno Yukinoshita and Yukino Yukinoshita. If something happened to Haruno, who else could the Yukinoshita Family be handed over to besides Yukino? Unlike the Shinomiya Family, where even if something happened to Oko Shinomiya...
There were still Shinomiya Yunying and Azure Dragon Shinomiya.
Therefore, even though Yukino Yukinoshita was not raised as the Yukinoshita Family's heir, the education she received still far surpassed that of ordinary people. Setting aside standard sports like ball games, running, and gymnastics, just consider horseback riding, aikido, golf...
It could be said that Yukino Yukinoshita excelled at every single one!
If Yukino Yukinoshita had received a "happy education," could she have mastered a whole range of sports such as horseback riding, aikido, archery, and so on?
Of course not!
It was simply because Yukino's talent far surpassed that of ordinary people that, with just a little training in activities like aikido, tennis, golf, basketball, and horseback riding, she had already reached a near-professional standard.
Unfortunately, the talents that could have allowed the second young lady to cross class barriers were completely useless to the Yukinoshita Family—there was no helping it. Though the Yukinoshitas were merely country bumpkins with money in the eyes of truly upper-class, prestigious families