Different cultures use different amounts of politeness and flowery speech. The English standard influenced American style, but it's very different from how people speak to each other in business in Poland, for example.
Like @NitpitckLawyer said, it's the resulting content that matters, not how it's presented. If a person anthropomorphizes an LLM in their mind (rather than just in their speech patterns), then they probably have pre-existing mental problems.
People used to also talk to burning bushes.