In the service industry, do you really pay attention to gestures (such as hotel waiters giving directions to guests)? Isn't that manners?

Yes, gestures are very important, especially for service personnel. Civilized gestures are a symbol of politeness. No matter which way you invite someone to go or which way you invite someone to sit, you should turn your hands, which is a respect for the guests. Of course, this refers to high-end places. Just say, please come with me.