I'm not finding any of the proposed answers very convincing. Both Hinduism and Judaism have been around a lot longer than Catholicism, so age isn't the answer. While those religions may be fractured, with various factions claiming to be the true expression, what of Catholicism? Not taking into account Eastern Catholic Churches, let's just look at the Roman Catholic Church. Even the so-called Trads are fractured -- SSPX, SSPX Resistance, CMRI, SSPV, Independent non-sedevacantist, Independent sedevacantist, FSSP, diocesan SP, etc., etc., and then there is liberal NO, conservative NO, charismatic NO, middle of the road NO, etc., etc. Vatican II shattered the Faith like a broken mirror. No doubt there are valid shards, but it was a tragedy.