I have grown disheartened with the US scene, I can no longer take someone with PhD credentials without checking them.
I only did a BA (Div) – Catholic Theology – but sheesh, the rigour we had to meet in essays! Looking at the crits on the wiki page, we'd be in trouble for such methodology.
Richard Dawkins wrote his books on why God cannot be. The counter argument, outlining the fundamental flaw in Dawkins' reasoning, was a much slimmer volume, but got none of the acclaim or exposure.
Likewise the Jesus Seminar ...
On my course we had one guy who was really good on lots of stuff, (a Patristics geek like me) but for some reason insisted Paul wrote the Letter to the Hebrews. Fr John, the Course Director, reasoned with him for ages as to why that's most unlikely ... all to no avail.
I've taken a brief break from my PhD program (in Data Science/Statistics) to focus on my health, it might be a few years before I go back to school and finish it, although I'm hoping to get a lot of my medical bills paid and my doctor visits over and done with a bit sooner than that.
I will say that there are a few people that I regularly speak with who hold PhDs, including one who has a PhD in theology. We talk a lot about philosophy of science, mostly, and I read their papers because they don't have many other people to geek out about them with.
Without fail, every single one of them has mentioned that they do a great deal of learning outside of the doctorate programs because the doctorate programs themselves are sort of bare bones. To be honest, though, this makes sense to me. PhDs mostly show that you're qualified to conduct research in a given field; they aren't necessarily a kind of award for knowing the material well but they're more of a way to show that you know how to get published.
Many people with PhDs, just like any other job, are doing the bare minimum and don't have a passion for the topics they're pursuing. Some of them sort of stop after getting a PhD and only use the doctorate as a sort of trophy without ever actually going into research.
PhDs aren't supposed to lend authority to someone's claims to expertise on a field of study, technically. They're just supposed to show that someone is competent enough to get a job in it and maybe even a successful career if they applied themselves. If anything, a PhD is only the beginning of someone's journey to becoming an expert in a given field.