I'm thinking more along the lines of how scripting languages are often used in, say, scientific domains (Python, R, etc...). Or how JavaScript and Ruby are more popular than, say, Rust and Haskell for startups.

"Poorly typed" means different things to different people, in the context of this article and thread it would probably mean weakly typed or dynamically typed? Which has nothing to do at all with the correctness of a formula or what output a program will produce.