Typescript has an excellent type system and one of the best development environments the entire dev world can use. You know what ecosystem it's a part of? The JS one. That "entire" one you're talking about has produced superb work such as React, V8, is pretty much responsible for Rust existing, and so on.

JS has dumb flaws. It doesn't mean anything is happening "in spite" of it. If anything, innovation is happening thanks to JS AND in spite of its flaws. But don't think for a second we would have even one tenth of the developers we have at our disposal today if JS and the internet didn't massively lower that barrier of entry. And less developers means less progress overall in the entire industry, not just less left-hand libraries.