Developers from statically typed backgrounds just don't seem to understand this use case. It's the quickest way to find an issue when you have a good idea of where the problem might be.
When you use Javascript for a few years, your habits change and you get used to really quick debug iterations. With Typescript, you get slower debug iterations but you don't get any extra flexibility beyond what Javascript itself offers. No pointers, no threads, no low-level access to system calls, no custom memory allocation, no performance gains... It doesn't have any of the features that make C/C++ an awesome language.
It's just usually indicative of code that can only be understood by running it.
Good statically typed code can be understood by reading it.