Look at the vessels that are able to find work in today's market. It is either the old boats that is able to offer low dayrates because they have been paid for and written down to zero years ago and don't have much in terms of finance costs. Those are attractive to charters that only look at daily rates and don't consider fuel consumption in actual working conditions, or efficiency for the work they are supposed to perform.
The other vessels in demand are the highly efficient multipurpose vessels that also happen to have crew comfort as one of their main criteria. (Much to your indignation, those are mostly Norwegian designed, built or owned)
I also agree with Miek. I had the "honour" of working with an American mudboat company in S.E.Asia already in 1970 and can vouch for the standard of education.
I was engaged as "Navigator" because the American Skippers could not navigate and most couldn't even read and write. My job was to go on board any of the boats that was going somewhere where you couldn't see land, or platforms.
I quit after abt. 2 1/2 month, when I was asked by the Marine Department in Singapore how I could be serving on 5 boats simultaneously? Copies of my then near brand new Master FG license were presented whenever a boat from that company was leaving Singapore, since Singapore did not accept Masters without license, regardless of which flag.
The boats were built and equipped to be manned by the locally available crews and therefore had to be as simple as possible. I though that was a well known fact among the older member on this forum at least.
Not to tease anybody, but I just posted pictures of a modern AHT of the Norwegian type in another thread.