I hate that book and it has been outdated for decades. It should not be followed in 2024. It's fascinating to read as a historical work though because you find the origins of all of corporate culture today, mostly the worst parts
Discussion
What ideas did you find in the book disagreeable ?
Social interactions are a developing meta changing over time. The book is almost a century old and it shows. It might have been novel at the time but it's been digested and overused by now. At this point by following what it says it just teaches you to speak like a customer service rep at a airline. A nice face with no actual emotion and people can tell there's no concern for them despite the facade.