Only a small portion of companies abroad have AB Initio programs but the vast majority don't require you to tick a box by studying agriculture or business management to fly an airplane! What other career do you know that could be practiced with a completely unrelated degree?
Well... you can become an Architect with a Master's Degree in Architecture (essentially a 2 year trade school) from Portland State University with an undergrad degree in anything..
Or you can become a Doctor or Dentist with an undergrad degree in just about any unrelated science, even if "pre-med" is the typical route, which is biology of some sorts.
I know of several professionals working in fields that they DO NOT have a degree in, but they do have A DEGREE.
The biggest problem flight training in the US has is the lack of any college credit for ratings and such. If one effectively got a 2 year equivalent Masters Degree from 0-ATP training, it would line up more with the rest of the "professions" you see out there... Law, Medicine, Engineering, etc..
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I have such a large sampling of pilots from all over the world that I know, and in some cases have helped train.. I can tell you that the US has some of the lowest standards for what is expected "educationally" out of a pilot of anywhere... including the 3rd world. It's entirely up to the hiring company to set any REAL standards. So the requirement of a college degree is just one of those standards, to thin thru the lazy and undesirable types. Lack of a college degree isn't a sure bet you're lazy, but it's a good bet you might be on average more lazy than the guy with one.
I've also had the fortune of flying with pilots from all over the world and all backgrounds and level of academia that wasn't related to this career.
As have I and I've yet to meet a pilot from outside the US that wasn't better trained and vetted than 90% of our pilots. Again, the airline is what sets the standard, not our training system or the FAA... those are rock bottom at best.