I find TypeScript very helpful! As a self taught developer I always used to just use JavaScript, but after joining a big company and working with TypeScript I prefer it now. I like how I always know "what's in the box" now when working with different objects and whatnot.
I think you need to be very careful there. Only because something is, e.g., a number, does not mean you know what it represents. I think Typescript might actually create a false sense of safety.
