As quick as I am to criticize the bizarre versions of Christianity, I do think you're in error to assume Pentecostalism is all or even mostly about "planned remarks passed off as spontaneous".
Improv is a thing, and can be trained as a skill even outside of comedy/entertainment.
Though, outside of Charismatic sects, Christianity does see a more reasonable level of "I had prepared by thinking about (verse X), but suddenly now I'm thinking about (obscure verse Y)."
Interestingly there is an entirely licit charismatic subsect within Catholicism called Catholic Charismatic Renewal. And yeah they’re basically Catholic Pentecostals.
Didn’t say all or mostly. It is one aspect. You’re right it’s typically bullet points that are fleshed out in the moment, rather than a rehearsed speech, when this happens.
Improv is a thing, and can be trained as a skill even outside of comedy/entertainment.
Though, outside of Charismatic sects, Christianity does see a more reasonable level of "I had prepared by thinking about (verse X), but suddenly now I'm thinking about (obscure verse Y)."