I think rather the implication is, don't pick Scala just because Python is more common. If you need to use Scala, use Scala. Like you said, there are plenty of situations where that is the case. But if Python is the right tool for the job, don't ignore it just to be different.

The same can be said of other languages with less emotion surrounding them. If C++ is the right tool for the job, don't use C just because of ideology. You are running a business, not a religion. You can only afford to be choosy if there are multiple "right tools for the job".