I have Scala recruiters reaching out to me and my students constantly. I don't know where you got the information about a lack of jobs, but that's not exactly true. There are more jobs for Scala developers than there are Scala developers. When I talk to the recruiters they tell me that they are finding it extremely hard to find people to fill the roles. Is the total number of Scala jobs on par with Java, Python, or JavaScript? No. But that's not what really matters, is it? What matters is supply and demand. Articles like this convince people to not learn Scala and then the positions that need Scala can't find people while those who know Scala are in extremely high demand.

You have even said yourself that you think Scala is a great language. For me, that is the reason to learn it and use it. One of the things that I hate most about software development in the US is that people seem to actively steer away from good tools. They keep picking languages like JavaScript, Python, and even PHP to write things in and suffer as a result. It also causes the quality of the software itself to suffer because we don't look for the tools that would help produce the best results and instead follow around like sheep after whatever seems to be currently popular or what people think allows them to get up and running quickly, ignoring that most of the lifetime of software is adding features and maintenance if it is actually successful.