Let me explain a little bit more.
In the culture of the Apostles, this is one of the ways they thought of to preserve the authentic teachings; now, in Judaism, unlike the Church where there is no Magisterium, it was a bit more decentralized so Jews had no central institution to turn to know what was and wasn’t the proper teachings of their faith. Since the Church has a Magisterium, they are the ones that interpret the Deposit of Faith, be it the written Tradition (Sacred Scripture, AKA the Bible),
or the Sacred (oral) Tradition.
So obviously, Catholic children aren’t catechized just like Jewish children were (or still are in more orthodox circles, I assume), we have the Magisterium which explains to us what is (and if need be, what isn’t) the authentic Deposit of Faith.
This isn’t much of a surprise, since there’s a substantial nexus between Judaism and Christianity. In the Eastern Churches, where Holy Mass/Divine Liturgy is celebrated by the priest behind the holy or royal doors, what does that remind you of? Of the high priest who could only access the Holiest of Holies once a year.
So as you can see, the Jewish culture of the time of the Apostles is central to this whole issue.