Why don't people with Master's degree get addressed with the title instead of just abbreviation after the name?

I know there’s the word Esquire but I don’t hear anyone addressed as Esquire so and so. For example I know this person is a therapist, http://www.soldenfrank.com/ but I don’t know what her title is, even after looking at her website. “Sari Solden is going to be a closing speaker and Dr. Michelle Frank will facilitate a panel discussion on the last of the conference.”, and so on. So, she doesn’t have a Doctorate, I guess but why isn’t she referred to as Esquire (or whatever else) Sari Solden? I’m asking without the title, they can get confused for another person with the same name.