If those men left the Baptist church for the Anglican Prayer Book and liturgy, or to the Catholic Church with its Mass, I don’t think they did it for entertainment, as you seem to imply. I don’t think anyone seeking entertainment would want to study a catechism and take classes. If they sought entertainment, they would have joined some non-denomiational “evangelical” church that has for its service a Christian rock concert with a sermon thrown in. Some people are happy with what the more radical Reformers left us, others see it as a truncated form of Christianity that has some important parts downplayed or missing.
I didn’t say that, now did I?
....And yes, in the RCC, if you as an adult desire to come into the Catholic Church, you will be asked for at least a year, to do both studying and taking classes called the RCIA. Right during Lent, there are special rituals that take place to prepare a non-Catholic for either baptism at Holy Saturday Eve before Easter, full reception into the Church, or to finish up the initation sacraments if Catholic.