Why do so many people in the military have useless degrees?

I am first responding by inquiring about YOUR degree.
Your query seems presumptuous and pompous for one whom I PRESUME to be a relatively newly minted NCO.

What appears 'useless' to one can be of considerable value to the 'owner.' You have absolutely no idea, unless you've conducted an in-depth interview, what the ultimate goal of the person holding what you reference as a 'useless' degree might have been.

Suggest you take the time to a) become acquainted with the person holding the 'questionable' degree, b) do your own research into the field of study - curriculum or c) MYOB and deal with the hand of cards you have been dealt, keeping you uneducated judgements to yourself.

It just reflects how non military get also get useless degrees. Colleges/universities are a business and do not care if the degree will be useless as look as they make their money.

In Other Words B.S. Degrees?
There's A Lot Of THAT Going Around....
They're About As Valuable As A Full Case Of V.D.

Like So Many Other Situation..Where A College Degree IS Required .
A Degree, ANY Degree, Even The Worthless Ones Will Do.
And When They Slap That Brass On Their Uniforms & Are The One's In Charge,
THAT'S When It SHOWS..........Educated Idiots, In Leadership Positions,
Even When They Don't Actually KNOW SH*T.!!
.
CONFESSION: ~ I Dropped Out Upon Completion Of The 8th GRADE ~
But Take A Look At My Bio.

We had a 1LT working FLIPL investigations.. I asked his degree.. he had a BS in Anthropology..
I accused him of using us as a study group..

Obviously, degree mills are bad, but the fields of study you listed are far from useless.

In fact, interdisciplinary studies and psychology are two of the most important degree types, and it should be mandatory for everyone to have some familiarity with them.

Perhaps This Will Help Explain The Reality Of Obtaining A College Degree.
.
Is College Worth It? Most Graduates Work in Other Fields ...
http://www.bloomberg.com/news/articles/2022-04-18/is...
Here’s a statistic that may give some pause: More than half of college graduates over the age of 25 don’t work in their field of study, according to a new survey from Intelligent.com
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Key facts about U.S. college graduates | Pew Research Center
http://www.pewresearch.org/short-reads/2022/04/12/10...
Recent college graduates are more likely than graduates overall to be underemployed – that is, working in jobs that typically do not require a college degree, according to an analysis of Census Bureau and B.L.S. data by the Federal Reserve Bank of New York. As of December 2021,
41% of college graduates ages 22 to 27 were underemployed, compared to non-degrees...
~~~~~~~~~~~~~
A You Can Tell, Their Degrees Aren't Being Used, Probably Due To ALSO Being Inadequately Educated..
Perhaps One Has A Degree In Automotive Engineering, But Can Only Do Tune-Ups.....
Would You Hire Him In Your Automotive Design Department?~ EXACTLY~ Unemployable!
Our High School Graduates Have The Identical Situation ~~ They HAVE Diplomas, But Have NO Qualifications For ANY Field Of Employment....ZERO, Even Micky-D's Has To Teach Them To Say:
"WOULD YOU LIKE FRIES WITH YOUR ORDER, SIR"?

I don't think any degree is useless. It shows commitment. I know some folks got theirs to get promoted. In the Air Force, it wasn't and still isn't about being a great Airman. It is about getting that degree and being well rounded, even if you couldn't do your job.

I don't have much use for a online degrees and my own college education was in the classroom where I feel You get a lot more out of the actual course of study. There are however quite a variety of courses that are very useful including English, History both of which I found not only a need for but use. My major was in Criminal Justice and I spent over 50 years in Law Enforcement and Law Enforcement relates occupations. Having said that however I have taken some courses online and did get basic information but I think You can gain a lot more within an actual classroom.

This was a shock to me as a naval enlisted person but it help me understand why so many OCS'ers were as bad as they were.