That’s not true at all, for any service profession. A barber that stops to answer the phone every two minutes isn’t cutting hair very efficiently.

A barber won’t be able to service that many customers anyway. A barbershop which gets a phone call every two minutes probably has several barbers on staff and a receptionist.

He will still need a pipeline of work to keep himself and his team busy. Someone has to do that job, if clients are self selecting then it makes sense to automate it if possible.