Why do they need a STEM degree? You yourself admit that degrees alone don't guarantee intelligence, and while I definitely understand that you wouldn't want to date/marry a highschool dropout, that's not what I'm talking about. Its safe to assume (and its correct) to state there's millions of people with technical certifications who while not formally educated at a college level are still very intelligent.
Since degrees don't guarantee intelligence why not just do the messy thing and sift through the retards until you find someone you can intellectually stomach? This is of course me assuming you haven't done so since I don't know your life as a stranger on the internet.
There's nothing wrong with wanting intelligence in a partner, its a far better reason than what most men and women usually go for. But...STEM degrees only? What about a successful man with a good career without one? Are you too autistic for that to work?
I'd accept medical degrees too

. But the main reason is that I need to be able to relate to him and talk to him. I have a group of friends who have gone to college, and a group of friends who haven't gone to college. I appreciate these friends equally, but the college friends I can relate to more. It's not just that they are more familiar with these concepts taught in college, its that they've spent more of their time learning complex things, so they grasp complex concepts more easily. One of my non-college friends relies solely on me to find software for his computer, because he and his wife are incapable of learning about computers. His excuse is dyslexia, which makes me cringe because it just means he's illiterate.
The process of going through college physically changes your brain. In order to get a STEM/medical degree you have to deal with a lot of math, careful observation, and science, along with theory, foundational knowledge, and critical thinking--and then you have to apply that knowledge to be judged by others for many years. Every semester you face another layer of difficulty in your degree, something that certifications don't offer. I've gotten certifications before, it's hardly challenging. It's the difference between knowing what to do (certification) and knowing the history of it, the processes of it, the reasons you have to do it,
and what to do (degree). Any asshole can look up the foundations of calculus on wikipedia but he's not going to
know that information unless he actually applies it and is judged for it, and he's not going to look at the world with the knowledge of calculus unless he knows it.
If you want a funnier comparison: someone who is racist because he observes niggers and hates them has the racism certificate, but someone who knows that niggers are inferior due to their genome and lack of agricultural/societal/industrial history has the racism degree. And he gets the Master's or Doctorate if he performs scientific research and writes a thesis on it.
This is a rare mindset in general, but it is even rarer among those who are uneducated. Trying to sift through the population for an intelligent individual without the distinction of education to at least improve my odds translates to horrible probability outcomes.
I mean, at the end of the day if your main goal is "make white peoples lives better" you should at least have white children. High IQ white people (especially high IQ white women) dying alone is actively detrimental to that effect.
I also want to be happy. I want to love and respect and trust the man that I am with. My life has been, for the vast majority, unhappy. Learning in college has made me happier. Talking to my professors, most of whom are doctors, has made me happier. I want my family to be a source of purpose and pride, not existential dread and frustration.