Problem is that only people with bad empathy enjoys it since otherwise you can see through peoples superficiality. So going through the motions and pretending to like each other doesn't work with/for many.
Most people have not read that book nor any like it. Most people appear pleasant because that's the way they genuinely are, not because they went to a seminar or read a book to learn how to fake it.
That's just not true. I often fail to be pleasant when I am in England, because the culture is different enough that when I try to be nice I mess it up in some manner. We can have the intent of being pleasant but fail to appear pleasant.
Those who do it well, which is most of us, just seem like nice, friendly and interesting people.