You made two points that caught my attention. The first is copycatting and intellectual property. I heard this anecdote from a college professor in 1981 - amazing I even remember it, my story is probably the Joe Walsh warped record version, but it still makes the point: He was a gun collector and came across a rifle someone was able to get back from Asia (don't know how, it was the Vietnam era). Apparently the serial number was a duplicate. Then he realized it was a knockoff gun that was recreated down to the lettering. He made the same observation you did. Something like they don't know what it does or what it's used for, but they figured everything needed to be there. Guess whomever made it thought the serial number was integral to the rifle. Same thing with fashion stuff, except there we call it counterfeit. The software and user interface to these radios seems to be an issue, too. I've had friends tell me they are glad they only work one repeater because changing frequencies is "weird." Guess they haven't mastered the same degree of intuitive operation that the Japanese have had a few decades along with US feedback to work on.
Your other point that hit me - testing labs. 100% on the money! Anyone who wants to spend the money can have a product tested by a lab (who is working for the customer, BTW) and submitted for type acceptance. In fact, a few people were tossing the idea around that it might have been worthwhile for them to narrowband with certain circuitry changes and reducing deviation, than it would have been to do a wholesale replacement of equipment.
Something to ponder about Chinese radios since there have been discussions about their capabilities:
90.203 (e), (f), and (g) [spoiler: they aren't supposed to transmit everywhere right out of the box, the FCC's exact wording is a must-read]. Everyone who reads the forums knows how that ended. So how thorough were these third party testing labs that certified compliance?
Personally, I think two things: 1) the Chinese government is artificially subsidizing the cost of these things and saturating the US to either kill-off traditional competitors or somehow introduce less reliable communications equipment; and 2) every penny I send that way will come back someday in the form of an aircraft carrier.