Are you seriously telling me you sat down with an internet browser and couldn't find any information about that specific programming language? It's far less notable than I assumed in which case (it took http://scidok.sulb.uni-saarland.de/volltexte/2007/1262/ which suggests to me you're lying).good, then let's just get rid of Wikipedia altogether. Since I can just get whatever information I need by googling there's really not a point to the site anyways. Is that your argument? At this point I'm 50% thinking that you're just trolling.
That's not what is happening - Wikipedia uses a democratic process to determine if something is considered notable by the community. We/They say nothing about whether something is important to you. If something is considered not to be sufficiently notable for Wikipedia that doesn't mean you can't write about it, blog about it, even create your own wiki about it.
That is exactly what happened in this case. One person flagged, one person deleted. The community voted consistently against the deletion. Check the AfD discussions yourself if you don't believe me. There was not a single vote agreeing the the AfD flag. You can carry on all you want about how WP has various procedures and policies and what not, but that is not what happens de facto with shocking regularity.
However, if Korean clam harvesting is no different to Japanese clam harvesting, which is more-or-less the same as Chinese clam harvesting, then they should be noted on a general article about clam harvesting you don't need a separate article for each country (given the imaginary constraints I've set) nor do you need a different article on each company that does clam harvesting, each location, each person working in each location, ...
But I should be able to create a page if any of those things are interesting or notable enough, if there's enough information on it. Korean clam harvesting may be special and unique in the world. It may have hundreds of thousands of adherents, it may have it's own culture, equipment, techniques etc. It may appear prominently in Korean culture, movies, newspapers or other media. In fact, there could be an entire musical genre of clam harvester music.
But you think "woah, wait a minute, I can't handle all this information" and so it gets shoved into a sidenote on a two page summary of "clam digging", and none of that information ends up compiled and summarized in an article like it deserves to be because some overzealous ignoramus decided to flag it as an AfD and the community who could discuss its importance generally doesn't speak English and even if they did and could vote to keep the article, would probably just get ignored by the editors anyways -- just like in this case.
Similarly it's not important to list every programming language and variant ever. If it's important to you then you'll find the information in a relevant place that gives fine esoteric information about this specific field.
I personally think that listing top-40 pop stars is esoteric information about a specific field I could care less about. But since lots of people seem to like it, we end up with countless pages to that dreck. These languages actually are important to computer science in the same way Fra Angelico is important to Renaissance art. Is Fra Angelico considered a notable master of painting in the same way well known artists are. No. But it's important to have his information summarized and presented, with notes regarding his influence and hist works.
Similarly, Alice ML is the Fra Angelico of the functional programming world. To remove a page about Alice ML is exactly the same as marking Fra Angelico's page AfD because you don't personally know about his notability and then a similarly ignorant editor agrees and BAM! it's gone for all time.