Exactly this. TypeScript also ended up being many users' entrypoint to JSX, decorators, etc as it became a catchall transpiler surface so respecting tsconfig is vital here (Node understandably has a policy against this). Plus there are extensionless imports, the "phantom" .js imports (pointing to .ts files), etc. List goes on. Type stripping ends up working out of the box for virtually no real world projects sadly.
https://nubjs.com/docs/runtime/typescript