People who are PhDs but not medical doctors who insist that other people address them as "Doctor" are near-universally thought of as pompous buffoons, so this is perfectly in-character from Bob.
As noted earlier, this is almost always idiots with Ph.D.s in education, the lowest IQ major in higher education. If someone is insisting on being called "Dr." with a Ph.D. they are trying to sell you something, or are education Ph.D.s, i.e. absolute cretins.
It's not a PhD, it's an EdD. There's a huge difference.
Here's the
requirements for an EdD from Vanderbilt's Peabody School of Education: 36-month (3 year) education doctorate, 54 credit hours, "a year-long independent research and analytic undertaking embedded within a group project." So, three years of coursework with a group project at the end.
Here's the
requirements for a PhD in Philosophy: at least 10 semesters (5 years) of work, 72 credit hours, a formal logic exam, a foreign language exam, teaching requirements, a written dissertation field exam (basically a big exam you have to pass before writing a dissertation—it's a huge deal and very nerve-wracking), an oral dissertation field exam (less nerve-wracking, a discussion-format exam about your topic of study), a dissertation prospectus and oral defense of that prospectus, and finally the submission of a dissertation and a final defense before a dissertation committee. That's
at least five years of coursework, teaching, and producing/defending a final dissertation in multiple parts over the course of two years.
So a 3 year program with a project at the end vs a 5 year program (at the very least, that's just how long funding is available) including multiple formal exams you
have to pass, the production of a dissertation, and the teaching of actual courses to college students. But only the former demand they be called "doctors."