There are many reasons why freelancers should prefer real-time video calling to messaging. Most of the times, when clients can see those that are calling them, they always feel comfortable. They will know more about the freelancers and what they can do. Messaging is not like that. In fact, unlike video calling where the freelancers can be getting instant direction on how to perform the task, messages aren't like that. You can't see the clients nor freelancers