That's a bad take - typescript enables tooling like refactoring/navigation/completion that goes far above a linter. Development tools are just better with typescript vs JS.
I'll note that most of the upsides are also subjective.
I never understood this. It takes maybe 10 minutes to set up TypeScript in a project if you’ve done it before.
Compared to all the other times involved (time to learn typescript, time saved debugging and writing tests for type errors) the setup time is a total non-issue.
Even other dynamic languages started moving in this direction due to the benefits of having type annotations brings to tooling/development experience overall.