I think a good way to evaluate languages from this perspective is through the lens of how easy it is to maintain understanding over time. I have learned bash well three or four times now, but I know now that I'm never going to remember enough of its quirks through the interim periods where I'm not focused on it, to be able to grok arbitrary scripts without refreshing my memory. This is very different for languages like java, go, python, and some others, which have their quirks, sure, but a much lower quirks per character ratio.

I might agree with "it's not hard to learn it", but I don't agree with "it's not hard to remember it".