That's true of any medium-small language, though. I'd argue it isn't true for the smallest of languages, because there's a genre of small languages that are made largely to trap nontechnical people into bad decisions, but it's true for all of the medium-small languages.

Languages that are niche enough to require passion to find and get running average a much better quality programmer, because why wouldn't they? Tesla drivers are, on average, better drivers, because fewer teenagers drive expensive cars. Conlangs have the highest intelligence per speaker, on average, because they require intention to learn. Subscription MMORPGs have the smartest players, because a $15/mo subscription filters out most children. Nearly two decades ago, the guy who made this forum wrote a post about this exact phenomenon with Python, before Python was actually relevant in the industry or had a million resources to learn. Filters work.

You aren't saying something controversial; you're just saying a more limited version of something that everyone already knows because you have tunnel vision. Filter the worst half out, and shockingly, the average looks better. This is a novel idea and you are a genius for coming up with it.