Respect. There are many great therapists out there. Many of them have Masters degrees, but some people want "the best" so they seek out people with doctorates. I have a full thriving private practice (thankfully). I've known several colleagues who struggle with that because there are a lot more people with their Masters than their Doctorates. You also get to do whatever you choose... assessments, therapy, consultation, more opportunities to work at universities, etc.