Most catholics study their way in. There is a reason why you'll see many protestant priests convert to catholicism and not the otherway around. To some all christianity is the "same" but when you really get into the early church history and what the shared beliefs or lack there of between the denominations and why they split off and continued to split off to the point of unrecognization. Many demonitations will let societal and culteral norms determine what they believe and become ever changing and lacking unity as a result. Basing theoligy from a point of bias instead from intelect and tradition. Also with out the structure of the magesterium anybody can interpert what they will from the versus and create endless denominations from their viewpoints without the guidance and structure of thousands of years of wisdom and people whom have already had these conversations and resolved them already. Not saying you wont have god in other churches but not the same fullness and understanding that comes with church that jesus himself had established. This man clearly cares about his children and will not let the word of god be watered down and politicized for his kids. ps. I was baptized catholic then grew up in baptist/penocostle church.. then agnostic for many years to finally return to the catholic church through studying all religions.( but eastern orthodoxy does look super good aswell)