Because it's flexible and type-safe. You have both productivity and scalability on both syntax level and infrastructure level. It's suitable for 99% of programmers and the businesses for now.
Only a problem if you're trying to be too inventive with it.
For most cases it's enough to just define interfaces, enums and maybe bundle some of this into discriminated unions. Throw in some generics for good measure. That's not a lot of work.
I've seen people do stuff like dependent types, but unless you're writing a library you don't actually need most of the type system's features.
There is type inference. And also, itβs not a typing contest, if typing speed is your bottleneck in programming you are doing something really badly, I suggest plugging in the keyboard.
