Not OP, but generally the arguments I've been told are:
Microsoft is an abomination (true).
"Don't make me explicitly state types; it is too confusing!" Installs 20 libraries including fucking pad left to eek out basic functionality.
Strongly typed haters are right up there with curly brace haters.
Same boat: people who hate typescript and therefore ensuring type safety probably also hate unit tests because they are too inconvenient to awesome rockstar developers.