Do you believe that taking vows of poverty, while focusing on even more advanced education and be instructed to live lives as Jesus led on Earth - being selfless, helping the poor, teaching a ministry with a focus on Jesus and his core values/teachings is "strange"?
The Jesuits and Franciscans are among the two most respected and revered orders of the Church. If you go to mass on Sunday and you hear that a Jesuit Priest will be saying the mass and homily, a tenured Catholic would know to pay attention - because they have the knowledge - and the wisdom they have is truthful - it manifests itself by the lives they live. They are the "real deal".
Peter and the Apostles received their education from "the source itself" - they lived it, breathed it and went through it - Jesus' ministry is as much a part of them as it was his own. But even the original Apostles themselves - in early times - Specifically Peter and Paul had disagreements over who to minister to, how to minister, the Law/Prophets - how they relate to Christianity - and even over (what is still disputed today among Christians) being"saved by grace" with or without "works".
Now imagine establishing a worldwide church, in Roman times - after being persecuted for the previous 100 - 300 years by the same Romans you are now establishing the Church for. Strict guidelines in regards to teachings, order, education, and so forth had to have been established - and to this day the Catholic Church is one of the few Churches of the world that a person attending mass in Boston hears the same readings and Gospel as a person attending church in Japan or Italy or Lebanon, etc.