How are you? may not be the best greeting if you are in a hurry, don't have much time or are not interested in listening to the answer.
How are you? is more of a salutation, not a question.
Do you always want to know how that person is? Do you want to hear their medical history? Do you want to hear about the family, kids pets etc?
Or are just looking to be polite, kind and cordial.
This is not about your special friends, family, and colleagues. There are many people when we ask we really are interested and want all the details.
Over the years, I have shared this with a few professionals who want to get down to the reason for the meeting. They are moving, working and fast-paced.
One, a receptionist in a doctor's office..another a busy assistant. When they greeted the client or patient and asked and said Hi, how are you? They sometimes got way more than they bargained for. Once you've asked the question, it is rude not to listen to the answer...no matter how long it takes.
So here is another way to be just as kind, polite and cordial.
Instead of saying, 'Hi How are you' (cause you might find out) say
"Nice to see you! "